Answer:
x=12
Explanation:
Since the two angles are complementary, both angles add up to 90°.
So, to find the value of the other angle, simply subtract 35 from 90.
90-35=55
Now we know that the expression is equal to 55.
4x+7=55
Subtract 7 from both sides.
4x=48
Divide both sides by 4.
x = 12