The answer is 7 and 4/ 7+4+11 and 7-4=3!
Answer:
$1.75 because if u add $3.50 + $1.75 u get $5.25 subtract that from $7.00 u get $1.75
X=15
expand the brackets and collect like terms so 6x+15=7x
then -6x to get x=15
Answer:
b=15
Step-by-step explanation:
Answer:
x = -2
x = -9
Step-by-step explanation:
The linear system is:
8x - 4y = 20 ⇒ (1)
5x - 8y = 62 ⇒ (2)
To solve the system multiply equation (1) by -2 to make the coefficients of y equal in values and different in signs, then add the resulting equation with equation (2)
∵ -2(8x) + -2(-4y) = -2(20)
∴ -16x + 8y = -40 ⇒ (3)
- Add equation (2) and (3)
∴ -11x = 22
- Divide both sides by -11
∴ x = -2
Substitute the value of x in equation (1) or (2)
∵ 8(-2) - 4y = 20
∴ -16 - 4y = 20
- Add 16 to both sides
∴ - 4y = 36
- Divide both sides by -4
∴ y = -9
