Answer:
Step-by-step explanation:
3x and 3y are not "like terms," despite having the same coefficient.
Like terms have the same variable. For example, 3x and 2x are like terms, so
3x+2x = 5x
2x + y = 5
x − 2y = 10
y = 5 − 2x
x − 2(5 − 2x) = 10
x − 10 + 4x = 10
5x − 10 = 10
<em>add 10 to each side</em>
<em>5x-10+10 = 10 + 10</em>
<em>5x=20</em>
5x = 0 <em>this is the error</em>
He needs to add 10 to each side
Answer:
x=12
Step-by-step explanation:
2x-4=x+8
2x-x=4+8
1x=12
12/1=12
12=x
Answer:
+ 2
Step-by-step explanation:
Group:
(2
+ 4x) (-5 - 10)
2x ( + 2) -5 ( + 2)
Common binomial factor = ( + 2)
Answer:
19 yards
Step-by-step explanation:
75 - 50 = 25
15 * 19 = 285
285 + 25 = 310
