Verified Answer :

frogger1

Add 3 to each side, then cross out the three. The equation can be rewritten as 2x+4x=24
2x plus 4x is 6x, making our equation 6x=24.
Divide by 6 on each side to get the answer x is 4. Your answer is 4

leelee1079

Simplifying
2x + -3 + 4x = 21

Reorder the terms:
-3 + 2x + 4x = 21

Combine like terms: 2x + 4x = 6x
-3 + 6x = 21

Solving
-3 + 6x = 21

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '3' to each side of the equation.
-3 + 3 + 6x = 21 + 3

Combine like terms: -3 + 3 = 0
0 + 6x = 21 + 3
6x = 21 + 3

Combine like terms: 21 + 3 = 24
6x = 24

Divide each side by '6'.
x = 4

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