Q10 PLEASE HELP ME IM BEGGIG PLEASE

The solution is

Step-by-step explanation:

2a - b + c = -2 1

a - b = - 7 2

2a + b = - 2 3

Make b the subject in the second equation and substitute it into the third equation

That's

b = a + 7

2a + a + 7 = - 2

3a = - 2 - 7

3a = - 9

Divide both sides by 3

a = - 3

Substitute a = - 3 into b = a + 7

b = - 3 + 7

b = 4

Substitute a and b into the first equation

That's

2(-3) - 4 + c = - 2

- 6 - 4 + c = - 2

-10 + c = - 2

c = - 2 + 10

c = 8

Therefore

Hope this helps you