Find the value of x in 5x + 8 = - 7

Mathematics

2 answers:

Lerok [7]3 years ago

6 0

Answer:

x=-3

Step-by-step explanation:

subtract 8 from both sides

5x+8-8=-7-8

simplify

5x=-15

divide both sides by 5

x=-3

hope this helped

Gnom [1K]3 years ago

5 0

X=-3 the value of x is -3

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35 degrees + 90 degrees + k

spayn [35]

Answer:

k would be 55

Step-by-step explanation:

35+90=125 and assuming that you're looking for a supplementary angle, the total must equal 180 so subtract 180-125 and you get k=55

5 0

3 years ago

-x - 1 = 221 + 2x <br> plzzzzzzzzz help

Otrada [13]

$Simplifying
-1x + -1 = 221 + 2x

Reorder the terms:
-1 + -1x = 221 + 2x

Solving
-1 + -1x = 221 + 2x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-2x' to each side of the equation.
-1 + -1x + -2x = 221 + 2x + -2x

Combine like terms: -1x + -2x = -3x
-1 + -3x = 221 + 2x + -2x$
$Combine like terms: 2x + -2x = 0
-1 + -3x = 221 + 0
-1 + -3x = 221

Add '1' to each side of the equation.
-1 + 1 + -3x = 221 + 1

Combine like terms: -1 + 1 = 0
0 + -3x = 221 + 1
-3x = 221 + 1

Combine like terms: 221 + 1 = 222
-3x = 222

Divide each side by '-3'.
x = -74

Simplifying
x = -74$