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Solve for x.

3/7x - 4 = -1

A. x = -7
B. x = -3
C. x = 3
D. x = 7

1 answer

To solve for x, we need to isolate x on one side of the equation.

Starting with the given equation:

3/7x - 4 = -1

First, we add 4 to both sides of the equation:

3/7x - 4 + 4 = -1 + 4

This simplifies to:

3/7x = 3

Next, we multiply both sides of the equation by the reciprocal of 3/7, which is 7/3:

(3/7x) * (7/3) = 3 * (7/3)

This simplifies to:

x = 7

Therefore, the solution is x = 7.

So, the correct answer is D. x = 7.