Question

(2z - 7) - 3(3z + 8) = 4z - 9
Please help me solve this!!
class 7
Linear equations
mathematics​

Answer 1

Answer:

(2z - 7) - 3 (3z + 8) = 4z - 9

2z - 7 - 9z - 24 = 4z - 9

2z - 9z - 7 - 24 = 4z - 9

- 7z - 31 = 4z - 9

- 7z - 4z = - 9 + 31

- 11z = - 22

z = - 22 ÷ (- 11)

z = - 2

Hence z = - 2

Hope it helps

Answer 2

Answer:

(2z - 7) - 3(3z + 8) = 4z - 9

→ 2z -7 - (9z + 24) = 4z - 9

→ 2z -7 -9z -24 = 4z - 9

→ 2z -7 -9z = 4z - 9 +24

→2z -7 -9z = 4z+15

→ 2z -9z -7 = 4z+15

→ -7z -7 = 4z+15

→ -7z = 4z +15-7

→ -7z = 4z + 8

→ -7z -4z = 8

→ -11z = 8

→ z = 8/11