Х+140+300=770 решите уравнение

Question

Х+140+300=770 решите уравнение

Answer 1

140+300=440
x=770-440
x=330

Answer 2

Х+140+300=770
х+140=770-300
х+140=470
х=470-140
х=330
____________
330+140+300=770
770=770