1) 63*X+1260=12602) 7*X+21=100-16Как найти X?

Question

1) 63*X+1260=1260
2) 7*X+21=100-16
Как найти X?

Answer 1

1) 63*X+1260=1260
63*x=1260-1260
63*x=0
x=0
2) 7*X+21=100-16
7*x+21=84
7*x=63
x=63 : 7
x=9

Answer 2

1). 63x + 1260 = 1260
63x = 1260 - 1260
63x = 0
x = 0
2). 7x + 21 = 100 -16
7x = 100 -16 - 21
7x = 63
x = 9