Question

Решите уравнение пж с проверкой 1,7х+21+3,1х=57 даю 10 баллов

Answer 1

1,7х+21+3,1х=57

1.7x+3.1x=57-21
4.8x=36
x=7.5

Answer 2

1.7*7.5+21+3.1*7.5=57

Answer 3

1,7*7,5=12,75
3,1+7,5=23,25
12,75+23,25+21=57