2
54% of 125 is what?
3. what percent of 200 is 104?
4. what percent of 124 is 62?

54% of 125 is 67.5

52% of 200 is 104

50% of 124 is 62

Step-by-step explanation:

Set up an equation:

Variable x = 54% of 125

54/100 = x/125

Cross multiply:

54 × 125 = 100 × x

6750 = 100x

Divide both sides by 100:

67.5 = x

Set up an equation:

Variable y = percent of 200 is 104

y/100 = 104/200

y × 200 = 100 × 104

200y = 10400

y = 52

Set up an equation:

Variable z = percent of 124 is 62

z/100 = 62/124

z × 124 = 100 × 62

124z = 6200

z = 50

answer: i'm great at algebra

~coco

step-by-step explanation:

starting with:    

5 + x - 12 = 2x - 7   

5 + x - 12 - x = 2x - 7 - x (subtract x from both sides)   

5 - 12 = x - 7 (combine and cancel x's from both sides)   

5 - 12 + 7 = x - 7 + 7 (add 7 to both sides)   

0 = x (add numbers together on both sides)       

so in order for the equation to be true, x must be 0.   

trying x = -0.5   

5 + x - 12 = 2x - 7 (original equation)   

5 + -0.5 - 12 = 2(-0.5) - 7 (plug in value of x)   

5 + -0.5 - 12 = -1 - 7 (did multiplication)   

-7.5 = -8 (did addition on both sides)       

since -7.5 is obviously not equal to -8, the value of -0.5 for x is wrong.   

trying x = 0   

5 + x - 12 = 2x - 7 (original equation)   

5 + 0 - 12 = 2(0) - 7 (plug in value of x)   

5 + 0 - 12 = 0 - 7 (did multiplication)   

-7 = -7 (did addition on both sides)       

since -7 equals -7, that demonstrates that the value of 0 for x is correct.   

trying x = 1   

5 + x - 12 = 2x - 7 (original equation)   

5 + 1 - 12 = 2(1) - 7 (plug in value of x)   

5 + 1 - 12 = 2 - 7 (did multiplication)   

-6 = -5 (did addition on both sides)       

since -6 is obviously not equal to -5, the value of 1 for x is wrong.