Answer:
2x+20+3x+10 = 180 (int. angles, parallel)
5x+30 = 180
5x=150
x=30
27/5 - 10/3
81/15 - 50/15
31/15
2 1/15
A typewriter costing $75.00 marked up 40% on cost M = 40 and S = 105
The error is that both sides of the equation have a variable. So if you were to combine your like terms, then you'd leave one side without a number and if your teacher is saying there is a left over number then it will be 0
Idk how to do this I forgot
