3*(13+5y)-24=585
39 + 15y – 24 = 585
15y = 585 + 24 – 39
15y = 570
y = 38
5*(9-х)+99=124
45 – 5x + 99 = 124
– 5x = 124 – 99 – 45
-5x = -20
x = 4
9*(2а+6)=90
18a + 54 = 90
18a = 90 – 54
18a = 36
a = 2
3*(13+5y)-24=585
39 + 15y – 24 = 585
15y = 585 + 24 – 39
15y = 570
y = 38
5*(9-х)+99=124
45 – 5x + 99 = 124
– 5x = 124 – 99 – 45
-5x = -20
x = 4
9*(2а+6)=90
18a + 54 = 90
18a = 90 – 54
18a = 36
a = 2