Question

What is the solution to the equation 7(a - 10) = 13 – 2(2a + 3)?

Ο
a = 11
Ο
a=
7
89
Ο
A
Ο
a = 621

Answer 1

a =7

Explanation:

Isolate the variable by diving each side by factors that don't contain the variable.

Answer 2

Answer: Second Option

`a=7`

Explanation:

We have the following equation:

`7(a - 10) = 13 -2(2a + 3)`

Apply distributive property

`7*a-7*10 = 13 -2*2a -2*3`

`7a-70 = 13 -4a -6`

`7a-70 =-4a +7`

Add 4a on both sides of the equation

`7a+4a-70 =-4a+4a +7`

`11a-70 =7`

Add 70 on both sides of the equation

`11a-70+70 =7+70`

`11a=77`

Divide by 11 on both sides of the equation

`(11)/(11)a=(77)/(11)`

`a=7`