Question

(-2,5 * у+0,75)*(+38,9)=0

Answer 1

-97,25у+29,175=0
-97,25у=-29,175
у=-29,175÷(-97,25)
у=0,3
(-2,5×0,3+0,75)×(+38,9)
(-0,75+0,75)×38,9=0
0×38,9=0
0=0