Answer:
79
Step-by-step explanation:
equation:
18x - 8 + 11x = 20x +19
Add like terms:
29x - 8 = 20x + 19
add 8 to both sides:
29x = 20x + 27
subtract 20x from btoh side:
9x = 27
Divide both sides by 9:
x = 3
substitute x into the equation for SU
SU = 20(3) + 19
Solve:
SU = 79
(18x-8) + (11x) = 20x + 19
18x-8+11x=20x+19 remove parenthesis
29x-8=20x+19 combine like terms
29x=20x+27 subtract
9x=27 isolate the variable
x= 3
SU=20x+19
SU= 20(3)+19
SU= (60)+19
SU= 79
