Answer:
UP=78
Step-by-step explanation:
TP=TU+UP
103=2x+3+6x+12
103=8x+15
103-15=8x
8x=88
x=11
UP=6x+12
UP=6(11)+12
UP=66+12
UP = 78
TU + UP = TP, substitute values
2x + 3 + 6x + 12 = 103, that is
8x + 15 = 103 ( subtract 15 from both sides )
8x = 88 ( divide both sides by 8 )
x = 11
Thus
UP = 6x + 12 = 6(11) + 12 = 66 + 12 = 78
