Think about how to use the interactive tool to form an expression equivalent to -x + (-3x) + 12 -9.
2 answers:
Answer:
x= 3/4 or .75
Step-by-step explanation:
Add -x and -3x and get -4x
Subtract the 9 from 12 and get 3
Set -4x=-3
-4x/-4=-3/-4
x=3/4
an equivalent expression is...
-4x+3
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Answer:
b)Add the equations to eliminate x.
Step-by-step explanation:
y= x+20
y= - x+2
Result of the addition: (-x cancels x)
2y = 22
y =11
11=x +20 -9 = x
11=9+2
11 = -9 +20
Answer:
x=15
Step-by-step explanation:
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Answer:
d
Step-by-step explanation:
