Помогите плиз номер 8 там уравнении

Question

Помогите плиз номер 8 там уравнении

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Comments

(240-x)=420

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X=420-240

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X=180

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А помоги еще 2

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X+(240*3)=1260

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X+720=1260

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X=1260-720

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X=540

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И 3 решили

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Да

Answer 1

X+240=1260:3
x+240=420
x=420-240
x=180

x+720=1260
x=1260-720
x=540

x+240=3780
x=3780-240
x=3540

Answer 2

(x+240)*3=1260
x+240=1260:3
x+240=420
x=420-240
x=180.