Simplifying 9Y + -4(Y + 1) = 31
Reorder the terms:
9Y + -4(1 + Y) = 31
9Y + (1 * -4 + Y * -4) = 31
9Y + (-4 + -4Y) = 31
Reorder the terms:
-4 + 9Y + -4Y = 31
Combine like terms:
9Y + -4Y = 5Y -4 + 5Y = 31
Solving -4 + 5Y = 31
Solving for variable 'Y'.
Move all terms containing Y to the left, all other terms to the right.
Add '4' to each side of the equation.
-4 + 4 + 5Y = 31 + 4
Combine like terms:
-4 + 4 = 0
0 + 5Y = 31 + 4
5Y = 31 + 4
Combine like terms:
31 + 4 = 35 5Y = 35
Divide each side by '5'.
Y = 7
