Question

I need help with a couple 9th grade algebra 1 problems.



Solve: 4(x − 1) − (x + 6) = 2

Solve: 7(x − 1) = 5(x + 2) + 1

Solve: −2(x − 5) = −4

Solve: −4(x + 10) − 6 = −3(x − 2)

Solve for r: C = 2^3.14r

Answer 1

1) x=4
2) x=9
3) x=7
4) x=-52

Answer 2

Thank you but i have one more problem if you dont mind...

Currently, Sam's coach is three times older than Sam. When Sam started soccer 5 years ago, his coach was five times his age. How old is Sam now?

Answer 3

It's quite simple just simplify and arrange them
1. 4(x - 1) - (x + 6) = 2
So we got to take out the parenthesis
4x - 4 - x - 6 = 2
4x - x - 4 - 6 =2
3x - 10 = 2
3x = 2 + 10
3x = 12
x = 12/3
x = 4

2. 7(x - 1) = 5(x + 2) + 1
7x - 7 = 5x + 10 + 1
7x - 7 = 5x + 11
7x - 5x = 11 + 7
2x = 18
x = 18/2
x = 9

3. -2(x - 5) = -4
-2x + 10 = -4
-2x = -14
x = -14/-2
x = 7

4. -4(x + 10) - 6 = -3(x - 2)
-4x - 40 - 6 = -3x + 6
-4x - 46 = -3x + 6
-46 - 6 = -3x + 4x
-52 = x
x = -52

5. i don't get the problem

Answer 4

for the sam problem, he is 10 right now

Answer 5

he was 5 before
5 * 5 = 25
25 + 5 = 30
30 / 3 = 10
5 + 5 = 10
so it works