(5.6 x+1.7x)*42=86 найдите значение x

Question

(5.6 x+1.7x)*42=86 найдите значение x

Answer 1

(5.6х + 1.7х)*42 =86
7.3х*42=86
306.6х=86
х=86/306.6
х=0.280496