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7-[5200:13-5×(360-2×x)]:20=2

Răspuns :

Kerasiatsamis
7-[5200:13-5*(360-2*x)]=40
5200:13-5*(360-2*x)=47
400-5*(360-2*x=47
5*(360-2*x)=447
360-2*x=442
2*x=442-360=82
x=82/2
x=41
7-[5.200÷13-5×(360-2×x)]÷20=2
7-[5.200÷13-5×(360-2×x)]=40
5.200÷13-5×(360-2×x)]=47
400-5×(360-2×x)]=47
5×(360-2×x)]=447
360-2×x=442
2×x=442-360=82
x=82÷2
x=41
Sper ca te-am ajutat!