Question

Реши уравнение x×8=720 420-y=210

Answer 1

х*8=720
х=720:8
х=90

420-у=210
у=420-210
у=210

Answer 2

1) $x \times 8 = 720 \\ x = \frac{720}{8} = 90$


2) $420 - y = 210 \\ y = 420 - 210 = 210$