x= 3 is solution of:
6x -12 = 3x + 8
9x -17 = 2x - 9
7x -11 = 2x + 5
7x - 10 = 2x +5
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Answer:
7x - 10 = 2x +5
Step-by-step explanation:
Solve for x:
7 x - 10 = 2 x + 5
Subtract 2 x from both sides:
(7 x - 2 x) - 10 = (2 x - 2 x) + 5
7 x - 2 x = 5 x:
5 x - 10 = (2 x - 2 x) + 5
2 x - 2 x = 0:
5 x - 10 = 5
Add 10 to both sides:
5 x + (10 - 10) = 10 + 5
10 - 10 = 0:
5 x = 5 + 10
5 + 10 = 15:
5 x = 15
Divide both sides of 5 x = 15 by 5:
(5 x)/5 = 15/5
5/5 = 1:
x = 15/5
The gcd of 15 and 5 is 5, so 15/5 = (5×3)/(5×1) = 5/5×3 = 3:
Answer:
x = 3
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