Which equation has solution x = -3?
1 answer:
A) 2x - 7 = -1
Add 7 to both sides of the equation.
2x = 6
x = 3
Choice A is not the answer.
B) 3x + 8 = 1
Subtract 8 from both sides.
3x = -7
Divide both sides by 3.
x = -2.3 repeating
Choice B is not the answer.
C) 1/2x + 8 = 10
1/2x = 2
Divide both sides by 1/2.
x = 4
Choice C is not the answer.
By process of elimination, choice D is the answer.
D) 1/2(2x - 6) = -6
x - 3 = -6
Add 3 to both sides.
x = -3
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Answers:
2x + 7
2x - 7 = 14
2 + 7
Answer:C- 3x - 7y and 3y - 7x
Step-by-step explanation:
It would be 7x10^-2
That number would be rounded to 0.07
10 tadpoles, have a good day