Answer:
y = 9
Step-by-step explanation:
2 + 4 ( y - 1 ) = 2y + 16
step 1 distribute the 4
4 * y = 4y
4 * -1 = -4
we now have 2 + 4y - 4 = 2y + 16
step 2 combine like terms
2 - 4 = - 2
we now have - 2 + 4y = 2y + 16
step 3 add 2 to each side
-2 + 2 cancels out
16 + 2 = 18
we now have 4y = 2y + 18
step 4 subtract 2y from each side
2y - 2y cancels out
4y - 2y = 2y
we now have 2y = 18
step 5 divide each side by 2
2y / 2 = y
18 / 2 = 9
we're left with y = 9
