Solve the following system of equations using the substitution method. x=4 -2y 4x+8y=20

2 answers:

7 0

Sub 4-2y fo x
4(4-2y)+8y=20
distribute
16-8y+8y=20
16=20
false

therefor there is no solution
if we look carefully, the lines are paralell

answer is no solution

iren2701 [21]2 years ago

4 0

Using the substitution method:

{ x = 4 - 2 y
4 x + 8y = 20

Subsititute x = 4 - 2 y

[ 4(4 - 2 y ) + 8y = 20 ]

Refine:

4( 4-2y ) + 8y = 20

16 - 8 y + 8 y = 20

0 = 16 - 20

-4 = 0

-4 = 0

-4 = 0 ( is false , therefore the system of equations has no solution )

hope this helps!

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Solution -9-8(1+4h)= -17

geniusboy [140]

Step 1. Add 9 to both sides

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Step 2. Simplify $-17+9$ to $-8$

$-8(1+4h)=-8$

Step 3. Divide both sides by $-8$

$1+4h=1$

Step 4. Cancel 1 on both sides

$4h=0$
Step 5. Divide both sides by 4

$h=0$

Done! :) Hope this helps! :)

To check $-9-8(1+4h)=-17$ follow these steps below:

Step 1. Let h = 0

$-9-8*(1+4*0)=-17$

Step 2. Simplify 4 * 0 to 0

$-9-8*(1+0)=-17$

Step 3. Simplify 1 + 0 to 1

$-9-8*1=-17$

Step 4. Simplify 8 * 1 to 8

$-9-8=-17$

Step 5. Simplify -9 -8 to -17

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Done! :)

5 0

3 years ago

Read 2 more answers

(-5f+8)4 use disributive property

GREYUIT [131]

Answer:

-20f+32

Step-by-step explanation:

-5×4=-20 put the x back

4×8=32

3 0

2 years ago