Question

решить уравнение:
60+×=340+130
×+240=320+40
140+×=650-120
400+×=850
×+880=1000-100

Answer 1

60+x=340+130
60+x=470
X=470-60
X=410

X+240=320+40
X+240=360
X=360-240
X=120

140+X=650-120
140+x=530
X=530-140
X=390

400+x=850
X=850-400
X=450

X+880=1000-100
X+880=900
X=900-880
X=20

Answer 2

х=340+130-60
х=410
х+240=320+40
х=320+40-240
х=120
140+х=650-120
х=650-120-140
х=390
400+х=850
х=850-400
х=450
х+880=1000-100
х=1000-100-880
х=20