👤

aflati x din x +5a+10b-8=25 stiind ca a +2b=4

Răspuns :

x +5a+10b-8=25
a +2b=4

x +5a+10b-8=25
x +5a+10b=25+8
x +5a+10b=33
x+5*(a+2b)=33
x=33-5*(a+2b)
x=33-5*4
x=33-20
x=13


x +5a+10b-8=25
a+2b=4

x+5(a+2b)-8=25
x+5*4-8=25
x+12=25
x=25-12=13