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3*(x:4*2)+4*(x:4*2)=140

Răspuns :

3·x÷2 + 4·x÷2=140
(3x+4x)÷2=140
7x=70
x=10
DAM FACTOR COMUN PE :( X:4 *2)
X:4*2(3*1+4*1)=140
X:4*2*7=140
X:4*2=20
X:4=10
X=40