Question

x+320=80×7; x-180=240÷3; 400-x=275+25.помогите пожалуйста

Answer 1

x+320=80*7
x+320=560
x=560-320
x= 240
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x-180=240/3
x-180=80
x=180+80
x=260
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400-x=275+25
400-x=300
x=400-300
x=100
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