Question

c) Află necunoscuta:
1 + {2 x [ 3+ (n - 4) x 5]:6} x 7 = 8​

Answer 1

1+{2×[3+(n-4)×5]:6}×7=8

{2×[3+(n-4)×5]:6}×7=8-1

2×[3+(n-4)×5]:6=7:7

2×[3+(n-4)×5]=1×6

3+(n-4)×5=6:2

(n-4)×5=3-3

n-4=0:5

n=0+4

n=4