Addition + Subtraction
y=-7
-8c=72
c=-9
-½b+9=5
b=8
The sum of 38 and twice a number is 124. Write the equation. Find the number.
38+2X=124
x=43
Kerry brought a picture frame on sale for $4.69. A week later, she returned to buy another frame. However, she had to pay the regular price for the second one. If the two frames cost Kerry $10.64, how much had the store reduced the price for sale?
Write an equation.
The new frame cost 5.95, so the store reduced the price by $1.26.
(10.64 - 4.69) - 4.69=F
2 - (3+y) = 6
y=-7
- ⅕ t = 17
t=-85
-8y-11=13
y=-3
Eight less than three-quarters of a number is 91. Write the equation and find the number.
(3/4)X-8=91
x=132
The perimeter of a square parking lot is 784m. How long is each side of the lot ?
784/4=X; X length of side.
OR 4X=784
X=196; 196 m.
(a-3) + 19 = 25
a=9
600 = -25x
x= -24
3(a-5)+19=-2
a=-2
Find three consecutive integers whose sum is 105.
X + (X+1) + (X+2) = 105
X=34
The Eagles won three times as many games as they lost. They won 21 games. How many games did they lose?
3X=21; X=games lost
X=7
7 games lost
6 + |t| = 14
t = -8, 8
3|y|=33
y= -11, 11
(x-13) - (x-5) + 2x = 0
x=4
Three quarters of a number is 21. Write the equation and find the number.
3/4 x = 21
x = 28
Brian has $88 in his savings account. If he saves $3.50 per week, how long will it take him to have $200 in his account.
88+3.50X=200; X=weeks
X=32
32 weeks.
2 = 6+|t|
No solution
3 = |n|/7
n= - 21, 21
7=(4+9y)/7
y=5
Five more than three times a number is 197. Find the equation and number.
3X+5=197
x=64
Burt's Burger Barn sold 495 hamburgers today. The number sold with cheese was half the number sold without cheese. Write an equation. How many of each kind were sold?
(1/2X)+X=495; X=non-cheese burgers
X=330
330 non-cheese burgers, 165 cheese burgers