5x - 10 + 65 = 90 what is the value of x?
2 answers:
Answer:
x = 7
Step-by-step explanation:
You must perform the opposite on each side.
5x - 10 + 65 = 90
5x - 10 + 65 - 65 = 90 - 65
5x - 10 + 10 = 25 + 10
5x / 5 = 35 / 5
x = 7
5 x 7 - 10 + 65 = 90
35 - 10 + 65 = 90
25 + 65 = 90
Answer:
x =7
Step-by-step explanation:
Solve for x:
5 x - 10 + 65 = 90
Add like terms. 65 - 10 = 55:
5 x + 55 = 90
Subtract 55 from both sides:
5 x + (55 - 55) = 90 - 55
55 - 55 = 0:
5 x = 90 - 55
90 - 55 = 35:
5 x = 35
Divide both sides of 5 x = 35 by 5:
(5 x)/5 = 35/5
5/5 = 1:
x = 35/5
The gcd of 35 and 5 is 5, so 35/5 = (5×7)/(5×1) = 5/5×7 = 7:
Answer: x = 7
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