Question

Решите уравнения 1.) 3,557+X=8. 2) . X-0.731=15 3) . 12.392+X=5(2.365+2.635)4.)125.95-X=6(2.65+4.35)​

Answer 1

$1)3,557+X=8\\X=8-3,557\\x=4,443\\2)X-0.731=15\\X=15+0.731\\X=15.731\\3)12.392+X=5(2.365+2.635)\\12.392+X=5\cdot5\\12.392+X=25\\X=25-12.392\\X=12,608\\4)125.95-X=6(2.65+4.35)\\125.95-X=6\cdot7\\125.95-X=42\\-X=42-125.95\\-X=-83.95\\X=83.95$