Question

Найдите корень уравнения

Answer 1

#1
-4z-200/12 = -19 |•12
-4z-200 = -19•12
-4z-200= -228
-4z-200+228=0
-4z+28=0 |:(-4)
z-7=0
z=7
Ответ: 7

#2
2b+59/3 = 15 |•3
2b+59 = 45
2b = 45-59
2b=-14
b=-14:2
b=-7
Ответ: -7

Answer 2

$\frac{ - 4z - 200}{12} = - 19 \\ - 4z - 200 = - 19 \times 12 \\ - 4z - 200 = - 228 \\ - 4z = - 228 + 200 \\ - 4z = - 28 \\ z = - 28 \div ( - 4) \\ z = 7$
Ответ: 7.
$\frac{2b + 59}{3} = 15 \\ 2b + 59 = 15 \times 3 \\ 2b + 59 = 45 \\ 2b = 45 - 59 \\ 2b = - 14 \\ b = - 14 \div 2 \\ b = - 7$
Ответ: -7.