Answer:
a=80 + b=75
Step-by-step explanation:
150% of A is equal to $120 and 120% of B is equal to $90
150%×A=$120 + 120%×B=$90
150/100×A=$120 + 120/100×B=$90
Cross multiply at each equal sign
150A×1=$120×100 + 120B×1=$90×100
150a=$12000 + 120b=9000
divide by 150 at A side and 120 at B side
150a/150=$12000/150 + 120b/120=9000/120
a=80 + b=75
