Answer:
13
Step-by-step explanation:
First add like terms in this case 1+7=8. Then then divide. 2x/8= 4. X=4
Multiply both sides by 2.
2m = a + b
Subtract both sides by b.
2m - b = a
Answer:
3
- 48
Step-by-step explanation:
Given
(a + 2)(3a² + 12)(a - 2)
= (a + 2)(a - 2)(3a² + 12) ← expand the first pair of parenthesis using FOIL
=(a² - 4)(3a² + 12) ← expand using FOIL
= 3
+ 12a² - 12a² - 48 ← collect like terms
= 3
- 48
Answer: x=-1, y=-8
Step-by-step explanation: solve for the first variable in one of the equations then subsitutte the result into the other equation