Question

a)7x+13x+256=556 b)357y-149y-8+224=624

Answer 1

7х+13х+256=556
20х=556-256
20х=300
х=300:20
х=15

357у-149у-8+224=624
208у=624-224+8
208у=408
у=408:208
у=1 200/208
у=1 25/26