Let X be the money Victor have now.

X = money Victor had initially + money given by mother + money given by father

X = 20 + 15 + 22 = 57

So the money Victor have now , X = $57.

Let x be the money left with him.

Money with Robert = $220

Money he donated to the charity = $55

Money left with him = Money with Robert - Money donated to charity

x = 220 - 55 = 165

Therefore, Robert is left with $165.

Let x be the money Irena makes in 6 hours.

Money that Irena makes in one hour = $7

Money that Irena makes in 6 hours = Money that Irena makes in one hour × Money that Irena makes in 6 hours

x = 7 × 6

x = 42

So, Irena makes $42 in 6 hours.

Let x be the number of cards each friend gets.

Number of baseball cards = 18

Number of friends = 9

Each friend should get the same number of cards. Therefore we must divide the total number of cards by the total number of friends.

x = 18 ÷ 9 = 2

So each friend gets 2 cards.

Let x be the number of crayons Lindsay will be left with.

Total number of crayons = 14.

Numbers of people sharing the crayons = 2.

Total Number of crayons Lindsay will be left with after sharing = Total number of crayonsNumber of people sharing the crayons

x = 14 ÷ 2

x = 7

So, Lindsay has 7 crayons now.

Let x be the money he is left with.

Money left = money Jim has - (cost of one glue bottle × number of glue bottles he buys)

x = $45 - (4 × 3)

x = 45 - 12

x = 33

So, Jim is left with $33.

Let T be the temperature at night

Night temperature, T = Temperature in the morning + temperature gone up by afternoon - temperature fell at night

T = 45°F + 10°F - 4°F = 51°F

So, the night temperature was 51°F.

Let x be the number of slices of bread he eats in a week's time.

Number of days in a week = 7

Number of slices of bread he eats per day = 2

Number of slices of bread he eats in a week's time = Number of slices of bread he eats per day × Number of days in a week

x = 2 × 7 = 14

So, Josh eats 14 slices of bread in a week.

Let x be the money left with Andrew

Money left with Andrew = Money initially he had + money he made at the jumble sale - money he spent for buying a shirt

x = 56 + 16 - 17 = 55

So, the money left with Andrew is $55.

Let n be the number of blue ballons

Number of balloons Sheela bought = 60

Number of yellow colored balloons = 15

Number of red colored balloons = 28

Number of blue balloons, n = Total number of balloons - number of yellow colored balloons - number of red colored balloons

n = 60 - 15 - 28 = 17

So, the number of blue colored balloons she bought, n = 17.

Let x be the money Alvin has now.

Money Alvin has now = money initially he had - money he spent + money he earned

x = 700 - 165 + 240 = 775

So, the money Alvin has now is $775.