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carlosego carlosego · Answer 1 · 2018-10-04T23:04:47+02:00

In step 2, multiply what is inside the parentheses by 7 (distributive property):

7 * x = 7x

7 * 3 = 21

In step 3, subtract -7x on both sides of the equation. (Property of subtraction of equality)

Then -7x + 4x = -3x

7x-7x + 21 = 21

In step 4, both sides of the equation are divided by -3.

So (owned by the equality division)

-3x / -3 = x

-21 / -3 = 7

Remember that the division of equal signs results in a positive number.

lisboa lisboa · Answer 2 · 2018-10-04T23:23:15+02:00

4x = 7(x-3) Given equation

4x = 7x - 21 7 is distributed inside the parenthesis . So the property used here

is distributive property

-3x = -21 7x is subtracted from both sides. 4x-7x is -3x. So the property used

here is subtraction property of equality.

x = 7 -3 is divided on both sides. -21/3 is 7. So the property used

here is division property of equality.