Question

3(5z-7) +2(9z-11) =4(8z-7) -111​

Answer 1

Answer:

z = 12.88

Step-by-step explanation:

3(5z-7) + 2(9z-11) = 4(8z-7)-111

Open all brackets

15z - 21 + 18z - 22 = 32z - 28 - 111

Start locating the same variable in brackets

(15z + 18z - 32z) = (-28 - 111 + 21 + 22)

Start solving

(23z-32z) = 116

9z = 116

z = 116/9

z = 12.88