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sergejj [24]
2 years ago
6

Please answer answer math question

Mathematics
1 answer:
Lynna [10]2 years ago
8 0

Only option d is the correct answer as x = 3 is a solution to the equation.

To solve this problem, we have to substitute the value of x into the equation and see if it is equal to zero.

<h3>Solution of an Equation</h3>

a)

3x+7 = x - 8

when x = -6

substitute the value of x

3x+ 7 = x - 8\\x = -6\\3x-x = -8-7\\2x = -15\\2(-6) = -15\\-12 \neq -15

equation (a) is wrong.

b)

-2x-8=-4x-1\\x = 3

collect like terms and substitute for x

-2x-8=-4x-1\\x = 3\\-2x+4x= -1+8\\2x = 7\\2(3) = 7\\6\neq 7

equation(b) is wrong

c)

-5x+7 = 2x - 14\\x = -8\\

collect like terms and substitute for x

-5x+7 = 2x - 14\\x = -8\\7+ 14 = 2x + 5x\\21 = 7x\\21 = 7(-8)\\21 \neq -42

d)

-(x-1)=4x-5-3x\\x = 3\\-(x-1) = 4x -5 -3x\\-x+1 = x- 5\\2x = 6\\2(3) = 6\\6 = 6\\

From the above calculation, only option d is the correct answer as x = 3 is a solution to the equation.

Learn more on solutions of equation here;

brainly.com/question/16863577

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