Х+240=1260•3
х+240=3780
х=3780-240
х=1540
<span>х + (400 - 130) = 770
х = 770 - (400 - 130) = 770 - 270
х = 500
Проверка: 500 + (400 - 130) = 770
770 = 770</span>
1. -27ⓧ+220=-5ⓧ
-27ⓧ+5ⓧ=-220
-22ⓧ=220
ⓧ=10
2. 7ⓐ=-310 +3ⓐ
7ⓐ-3ⓐ=-310
4ⓐ=-310
ⓐ=
3х=132
х=132:3
Х=44
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