8.
x + 10 = 18 18 - 10 = x 18 -10 = 8 x = 8
-10
18
Subtract the second equation, giving -18 = y so x = -46
-2
If x equals 10 and y equals 10, then 9x plus 8y equals 170.
-8 + 10x = 18 10x = 18+8 10x = 26 x = 26/10 x = 2.6
x equals 19
x=10
you mean: x+3x+3=x+18 so x=5
X= 5
1