Question

решили уравнения(630-х)+210=500; (х+190)-370=330.;

Answer 1

(630-х)+210=500
630-х=500-210
630-х=290
х=630-290
х=340

проверка
(630-340)+210=500
290+210=500
500=500

(х+190)-370=330
х+190=330+370
х+190=700
х=700-190
х=510

проверка
(510+190)-370=330
700-370=330
330=330

Answer 2

(630-x)+210=500
630-x=500-210
630-x=290
x=630-290
x=340

( x+190)-370=330
x+190=330+370
x+190=700
x=700-190
x=510