Q: 3x what equals 21?

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

3

If: 3x = 21 then x = 7

a+b=84 a=3b 3b=84-b 4b=84 b=21 a=3*21 a=63 The two numbers are 21 and 63lets call the one number X and the other Y so y equals 3X so 3X+X equals 84 so 4X equals 84 we divide by 4 so x equals 21 so y equals 21*3 equals 63 so the two numbers are 63 and 21

(42/3x)*12=24 42/3X=2 42=6X x=7 if it'isn't 3x but x^3 then 21=X^3 21^(1/3)=2.76

Related questions

21.

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

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

3x-6=21-6=15

x=-7

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

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

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

-18

12

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

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