Question

8. Реши уравнения. a - 86 =321 + 319 696 - X=114 +126 x + 150 = 800 - 440 560 + b =980 - 140​

Answer 1

а-86=321+319

а=321+319+86

а=726

696-х=114+126

-х=114+126-696

-х=-456

х=456

х+150=800-440

х=800-440-150

х=210

560+b=980-140

b=980-140-560

b=280

Answer 2

Ответ:

$1)a - 86 = 321 + 319 \\ a - 81 = 640 \\ a = 640 + 86 = 726 \\ 2)696 - x = 114 + 126 \\ 696 - x = 240 \\ - x = 240 - 696 \\ - x = - 456 \\ x = 456 \\ 3)x + 150 = 800 - 440 \\ x + 150 = 360 \\ x = 360 - 150 \\ x = 210$

$560 + b = 980 - 140 \\ 560 + b = 840 \\ b = 840 - 560 \\ b = 280$