14*27-355-21=x*4-51*14

Răspuns :

14×27-355-21=x×4-51×14
378-355-21=x×4-714
2=4x-714
4x-714=2
4x=2+714
4x=716
x=[tex] \frac{716}{4} [/tex]
x=179
378-355-21=X4-714
2=x4-714
X4-714=2
x4=2+714
x4=716
x=716:4
x=179