Question

What is 100-A + 20 -70

Answer 1

The answer is 50 - a.

Explanation:

1) Collect like terms.

`- a + (100 + 20 - 70)`

2) Simplify.

`50 - a`

Therefor, the answer is 50 - a.

Answer 2

A=50

Explanation:

assuming you mean 100-A+20-70=0

you need to solve for A, which means add all your numbers together and isolate A.

-A+50=0

A=50