Question

valoarea lui a pentru care ecuatia a+0,4• x=10are solutia 20

Answer 1

a+0,4×x=10
a=10×0,4x
a=4x
x=4×10-20
x=40-20
x=20

Answer 2

x=solutie=20
a+0,4x20= 10
a+8=10
a=10-8
a=2