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Q: 3x what equals 21?

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21.

If: 3x-3 = 7x+21 Then: x = -6

3x-6=21-6=15

-3x=-21+4x-3x-4x=-21+4x-4x-7x=-217x=217x/7=21/7x=3

x=-7

3x = 96 - 75 produces the equations 3x = 21 and x = 7

3x=96-75 3x=21 x=7

12

-18

3x-6 = 21 3x = 21+6 x = (21+6)/3 x = 9 You shouldn't ask us to solve your math homework.

Solve for x: 3x=(96-75) 96-75= 21 / 21:3= 7

In 3x = 96 - 75 the "x" stands for the number which, when multiplied by 3, equals the difference between 96 and 75. 96 - 75 = 21 If 3x = 21 then x = 21 divided by 3, or 7

the answer to 3 x 7 = is 21

-3/7

5x+7=3x-21 -7= -7 5x=3x-14 -3x=-3x 2x=-14 2x/2x=2x/-14 x=-7 The Answer Is -7 -

2y+3x=21 is y=-(3/2)x+(21/2) which is y=-1.5x+10.5

7y+3x-21 =0 7y = -3x+21 y = -3/7x+3 The y intercept is 3

3x + 7 = -4x + 28 implies 7x + 7 = 28

x = 4

-3x = 3 + y 3 + y - 5y = -21 -4y = -24 y = 6 x = -3

3X + 6 = 21 subtract 6 from each side 3X = 15 divide both sides integers by 3 X = 5 =======check 3(5) + 6 = 21 15 + 6 = 21 21 = 21 ========checks

This only works if x=11.

3

y-intercept = 3y-intercept ; x = 07y + 3x - 21 = 07y + 3(0) -21 = 07y -21 = 07y = 217y/7 = 21/7y=3

First you simplify: 3x=21 Then you divide both sides by 3: x=7