Question

Решить уравнения (450/Х+50)/70=2

Answer 1

(450/х + 50) / 70 = 2
450/х + 50 = 2 * 70
450/х + 50 = 140
450/х = 140 - 50
450/х = 90
х = 450 : 90
х = 5
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(450/5 + 50) / 70 = 2
(90 + 50) / 70 = 2
140 / 70 = 2
2 = 2
Ответ: х = 5

Answer 2

(450:x+50):70=2
450:x+50=2•70
450:x+50=140
450:x=-50+140
450:x=90
x=450:90
x=5