What number does x stand for in this equation?

Mathematics

2 answers:

shtirl [24]2 years ago

6 0

Answer:

C. -3

Step-by-step explanation:

Subtract 6 from 27 and then divide 21 (27-6) by -7 to get -3

Svetllana [295]2 years ago

4 0

-7x + 6 = 27

Subtract 6.

-7x = 21

Divide -7 by both sides.

x = -3
C

You might be interested in

Solve the system of linear equations by graphing.<br> Y = 3.2<br> y - 4= 32

mihalych1998 [28]

Answer:

Solutions to equations of this form are ordered pairs (x, y), where the coordinates, ... When given linear equations with two variables, we can solve for one of the ... Since the solutions to linear equations are ordered pairs, they can be graphed using the rectangular coordinate system. ... 32. x−y=0 x − y = 0 ; {10, 20, 30}. Find

Step-by-step explanation:

4 0

3 years ago

Please help me with #'s 5&6

Fynjy0 [20]

$5.\\(x+3)^2+7=-2\qquad|-7\\\\(x+3)^2=-9 < 0\\\\\text{NO REAL SOLUTION}\\\\(x+3)^2=-9\to x+3=\pm\sqrt{-9}\\\\x+3=-3i\ \vee\ x+3=3i\qquad|-3\\\\\boxed{x=-3-3i\ \vee\ x=-3+3i}$

$6.\\4(x-10)^2=25\qquad|:4\\\\(x-10)^2=\dfrac{25}{4}\to x-10=\pm\sqrt{\dfrac{25}{4}}\\\\x-10=-\dfrac{\sqrt{25}}{\sqrt4}\ \vee\ x-10=\dfrac{\sqrt{25}}{\sqrt4}\\\\x-10=-\dfrac{5}{2}\ \vee\ x-10=\dfrac{5}{2}\\\\x-10=-2.5\ \vee\ x-10=2.5\qquad|+10\\\\\boxed{x=7.5\ \vee\ x=12.5}$