Question

Реши уравнения: x+9=10   10-x=1   x-1=9

Answer 1

1) x + 9 = 10 -9 -9 -9 from both sides x = 1

2) 10 - x = 1 10 - 10 - x = 1 - 10 subtract 10 from both sides -x = -9 -x/-1 = -9/-1 divide both sides by -1 to isolate x x = 9

3) x - 1 = 9 +1 +1 +1 to both sides x = 10

Итак, решением уравнений являются x = 1, x = 9 и x = 10.