Question

How do you solve `9a + 15 =10a - 7`?

Answer 1

`a=22`

Explanation:

Given,

`9a+15=10a-7`

Subtract `9a` from both sides.

`9acolor(white)(i)color(red)(-9a)+15=10acolor(white)(i)color(red)(-9a)-7`

`15=a-7`

Add `7` to both sides.

`15color(white)(i)color(red)(+7)=a-7color(white)(i)color(red)(+7)`

`a=color(green)(|bar(ul(color(white)(a/a)color(black)(22)color(white)(a/a)|)))`