First equation: 30 - x = 2030 - 20 = xx = 10
Second equation: x + 1 = 4010 + 1 = 40x = 39
Third equation: y - 8 = 7y = 7 + 8y = 15
So, the solutions for the equations are:x = 10x = 39y = 15
First equation: 30 - x = 20
30 - 20 = x
x = 10
Second equation: x + 1 = 40
10 + 1 = 40
x = 39
Third equation: y - 8 = 7
y = 7 + 8
y = 15
So, the solutions for the equations are:
x = 10
x = 39
y = 15