2 years ago

How to solve x + 5y = 8x - 20

Mathematics

1 answer:

lara31 [8.8K]2 years ago

4 0

Answer:

Step-by-step explanation:

x + 5y = 8x - 20

5y = 8x - x -20

5y = 7x - 20

y = 7x/5 - 20/5

y = 7x/5 - 4

You might be interested in

Maya spent 40% of her savings on a bike it cost her $85 how much money does she have left

shusha [124]

Let be Z the money ;
We have ( 40 / 100 ) x Z = $85 ;
( 4 / 10 ) x Z = $85 ;
( 2 / 5 ) x Z = $85 ;
Z = $( 85 x 5 ) ÷ 3 ;
Z = $425 ÷ 3 ;
Z = $141,66 ≈ $142 ;

8 0

2 years ago

Louisa starts training for cross country. She records how far she can run without stopping each week.

PIT_PIT [208]

Answer:

I need more info!

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

If a caterer charges a fixed cost for preparing a dinner plus an additional cost for each person served. You know that the cost

lozanna [386]

$x+100y=750 \\ x+150y=1050 \\ 50y=300 \\ y=6 \\ x=750-600=150$
The fixed cost is $150, while the per-student cost is $6.

3 0

2 years ago

Read 2 more answers

9/3 divided by 1/7<br> Someone pls help

irinina [24]

Answer:

the answer is 9/21

simplified is 3/7

7 0

2 years ago

Solve and graph the following inequality: 3(7x+17) > -19 + 14x

love history [14]

Answer:

Solving the inequality we get: $\mathbf{x>-7}$

Step-by-step explanation:

We need to solve and graph the inequality $3(7x+17) > -19 + 14x$

Solving:

$3(7x+17) > -19 + 14x$

Step 1: Multiply 3 with terms inside the bracket

$21x+51 > -19 + 14x$

Step 2:Subtracting 51 on both sides

$21x+51-51 > -19 + 14x-51\\21x>14x-70\\$

Step 3: Subtract 14x on both sides

$21x-14x>+14x-70-14x\\7x>-70$

Step 4: Divide both sides by 7

$\frac{7x}{7}>\frac{-70}{7}\\x>-10$

Solving the inequality we get: $\mathbf{x>-7}$

The graph is attached in the figure below.

5 0

2 years ago