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fiasKO [112]
3 years ago
15

Whats the answer to 3x + 4 = 7x + 8

Mathematics
2 answers:
Yakvenalex [24]3 years ago
7 0

Answer:

-1

Step-by-step explanation:

Add '-7x' to each side of the equation.

4 + 3x + -7x = 8 + 7x + -7x

Combine like terms: 3x + -7x = -4x

4 + -4x = 8 + 7x + -7x

Combine like terms: 7x + -7x = 0

4 + -4x = 8 + 0

4 + -4x = 8

Add '-4' to each side of the equation.

4 + -4 + -4x = 8 + -4

Combine like terms: 4 + -4 = 0

0 + -4x = 8 + -4

-4x = 8 + -4

Combine like terms: 8 + -4 = 4

-4x = 4

Divide each side by '-4'.

x = -1

Simplifying

x = -1

Nostrana [21]3 years ago
4 0

Answer:

0

Step-by-step explanation:

3x + 4 =7x + 8

group like terms:

3x - 7x = 8 - 4

step 2:

-4x = 4

step 3:

-4x/-4 = 4/-4

therefore -4 will cancel -4 to remain the x :

x = 4/-4

which is equal as 0:

x =0

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2. Three points of a parallelogram are (4, 3), (-4, 3), and (2, 3). Find the coordinates of the 4th point to complete the parall
antiseptic1488 [7]

Parallelograms have equal and parallel opposite sides

<em>The coordinates of the 4th point is (-2,3)</em>

Let the parallelogram be ABCD, such that:

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B =(-4,3)

C = (2,3)

A and B have the same y-coordinates, while their x-coordinates are additive inverse

This means that:

The y-coordinates of point C and point D will be the same, while their x-coordinates will be additive inverse.

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2 years ago
Expand and simplify (x+5)(x+2)
Savatey [412]
Answer= x²+7x+10

When we want to expand expressions such as this, the FOIL method helps us remember what exactly to do. FOIL stands for

F:First
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I:Inner
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So, given the expression (x+5)(x+2), lets multiply the first two terms.

x*x=x²

now the outer two terms

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x²+7x+10

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