Question

385-[180-2×(50-35÷x):9]=5×3+13×15+40÷8​

Answer 1

Răspuns:

x=7

Explicație pas cu pas:

385-[180-2(50-35:x):9]=5×3+13×15+40:8

385-[180-2×(50x-35)/x×1/9]=215

385-[180-(100x-70)/9x]=215

385-180+(100x-70)/9x=215

(100x-70)/9x=215-205

100x-70=90x

100x-90x=70

10x=70

x=70:10

x=7