Question

реши уравнение.x+18=78 21-x=15 x×13=91 x:5=20

Answer 1

1) х+18=78
х=60
2) 21-х=15
х=6
3) х*13=91
х=7
4) х:5=20
х=100

Answer 2

x +18 = 78
x = 78 - 18
x = 60

21 - x = 15
x = 21 - 15
x = 6

x * 13 = 91
x = 91:13
x = 7

x : 5 = 20
x = 20 * 5
x = 100