Question

решить уравнение Х*9+420=492 836-Х*8=772

Answer 1

1) x*9 + 420 = 492

9x + 420 = 492

9x = 492 - 420

9x = 72

x = 72 : 9

x = 8.

2) 836 - x*8 = 772

836 - 8x = 772

8x = 836 - 772

8x = 64

x = 64 : 8

x = 8.

Answer 2

X*9+420=492

X*9=492-420

X*9=72

X=72:

X=8

836-Х*8=772

X*8=836-772

X*8=64

X=64:

x=