Question

100-7×8=a-6×9 / 4×2×a=9×1×8 /6×8-a=6×7+a /1×0×6=0×a×a​

Answer 1

100 - 7 × 8 = a - 6 × 9

100 - 56 = a - 54

44 = a - 54

a - 54 = 44

a = 44 + 54

a = 98

4 × 2 × a = 9 × 1 × 8

8 × a = 9 × 8

8 × a = 72

a = 72 : 8

a = 9

6 × 8 - a = 6 × 7 + a

48 - a = 42 + a (facem mersul invers)

48 - 42 = a + a

6 = 2a

2a = 6

a = 6 : 2

a = 3

1 × 0 × 6 = 0 × a × a

0 = 0

(deoarece orice număr înmulțit cu 0 dă 0).