Math

1. Solve the equation. -6g = 42

a. g = 7
b. g = -7
c. g = 252
d. g = -252


2. Solve the equation. x/8 = 16

a. x = 128
b. x = 24
c. x = 8
d. x = 2



3. Solve the equation. 12m = 14.4

a. m = 120
b. m = 12
c. m = 1.2
d. m = 0.12


4. Solve the equation. x/3 = -15

a. x = 45
b. x = -45
c. x = 3
d. x = -3


5. Select all of the equations that have a solution of 4. (choose only 2)

a. 5x = 20

b. 8x = -32

c. -4x = 16

d. x/2 = 2

e. x/4 = 16

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asked by Malasia
  1. I don't understand any of this which is why I didn't pick answers for you guys to check.

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    posted by Malasia
  2. You just have to remember that dividing a number by itself gives a quotient of 1. When it says "solve for x" that means you want to find the value of x all by itself.

    SO, if you have

    -6g = 42

    You just need to divide by the -6 to get g all by itself. Since -6g = 42,

    -6g/-6 = 42/-6
    (-6/-6)g = -7
    g = -7

    Then you can check your answer by multiplying by -6 to make sure you get the same original values:

    -6g = -6(-7) = 42.

    #2 is the same, but instead of dividing, you multiply to get rid of the fraction

    x/8 = 16
    (x/8)*8 = 16*8
    x(8/8) = 128
    x = 128

    #3 and 4 are just the same, using different numbers.

    For #5, just replace every x with a 4 and see whether the statement is true.

    5x=20
    5(4) = 20
    20 = 20
    so, yes. x=4 is a solution to that equation.

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    posted by Steve

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