Question

If a+b = 180 and 2a + 3b = 60 find a and b

Answer 1

a = 480

b = -300

Explanation:

a = 180 - b

b = 180 - a

2(180 - b) + 3b = 60

360 - 2b + 3b = 60

360 + b = 60

subtract 360 on both sides

b = -300

a = 180 + 300

a = 480

check: 480 -300 = 180

2(480) + 3(-300) = 60

960 - 900 = 60

b = 180 - 480

b = -300