Answer:
x=4
Step-by-step explanation:
3+x=7
Subtract 3 from both sides as Subtraction is the opposite of Addition.
So 7-3 = 4
X=4
x = 4
3 + x = 7 ( isolate x by subtracting 3 from both sides )
x = 7 - 3 = 4
a. n= 1x +7
b. n= 12 + 4x
Answer: 4 terms
-4a , 8c, -4b, and 3
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28,29,30,33,33