Question

1+{2•[3+(x-4)•5]:6}•7=8

Answer 1

Răspuns:

{2×[3+(x-4)×5]÷6}×7=7

2×[3+(x-4)×5]÷6=1

2×[3+(x-4)×5]=6

3+(x-4)×5=3

(x-4)×5=0

x-4=0

x=4

Answer 2

1+{2•[3+(x-4)•5]:6}•7=8

1+[2•(3+x-4•5):6]•7=8

1+[2•(3+5x-20):6]•7=8

1+[2•(-17+5x):6]•7=8

$1 + \frac{2 \times ( - 17 + 5x)}{6} \times 7 = 8 = > 1 + \frac{ - 17 + 5x}{3} \times 7 = 8 = > 1 + \frac{( - 17 + 5x )\times 7}{3} = 8 = > 1 + \frac{ - 119 + 35x}{3} = 8 = > 3 - 119 + 35x = 24 = > - 116 + 35x = 24 = > 35x = 24 + 116 = > 35x = 140 = > x = 4$