L, A, B = the amount of money each person has.
L + A + B = 70
B = 3L
L = A +5 or A = L-5
Set up an equation in L only:
L + L - 5 +3L =70
5L -5 = 70
5L =75
L = 15
follows
B=3*15 =45
A = 15 - 5 = 10

7 0

3 years ago

Solve the equation for x.

Degger [83]

Answer:

$x=-\frac{11}{8}$

Step-by-step explanation:

Hi there!

$(x - 4) - (x + 7) = 8x$

Open up the parentheses

$x - 4 - x - 7 = 8x$

Combine like terms

$x -x - 4 - 7 = 8x\\-4-7=8x\\-11=8x$

Divide both sides by 8 to isolate $x$

$-\frac{11}{8}=x$

I hope this helps!

4 0

3 years ago

Suppose you pay $24 for a pair of shoes that has been discounted 20%. What is the original price of the shoes? My Teacher wants

beks73 [17]

X = original cost of shoes
x - .20x = discounted cost of shoes
Add like terms
x - .20x = .80x

Equation

.80x = $24
Divide both sides of the equation by .80.

Answer
x = $30 - original price of the shoes

5 0

3 years ago