1. What value of x makes the equation 12x - 15 = 6 - 3x true?

2 * 4 + 7 = 15
Because 2 * 4 = 8
8 + 7 = 15

2x + 7 = 15
Get 2x by itself
Take away 7 from both sides.
2x = 8
Divide both sides by 2, or multiply both sides by 0.5.
x = 4.
Your answer is C.)

[tex]\boxed{ \bold{ \huge{ \boxed{ \bold{ \sf{x = 2}}}}}}[/tex]

Step-by-step explanation:

[tex]\sf{2x + 14 = - 6 + 12x}[/tex]

Move 12x to left hand side and change it's sign

⇒[tex]\sf{2x - 12x + 14 = - 6}[/tex]

Move 14 to left hand side and change it's sign

⇒[tex]\sf{2x - 12x = - 6 - 14}[/tex]

Collect like terms

⇒[tex]\sf{ - 10x = - 6 - 14}[/tex]

Calculate

⇒[tex]\sf{ - 10x = - 20}[/tex]

Divide both sides of the equation by -10

⇒[tex]\sf{ \frac{ - 10x}{ - 10} = \frac{ - 20}{ - 10} }[/tex]

Calculate

⇒[tex]\sf{x = 2}[/tex]

Hope I helped!

Best regards!!

The answer is 4. 2(4)+7=15.

This app is broken I need help on my own question

x=1.4

Step-by-step explanation:

add 3x to both sides to get 15x-15=6

Then add 15 to both sides to get 15x=21

Then divide by 15 on both sides to get x=1.4

x = 7/5

Step-by-step explanation:

Step 1: Write out equation

12x - 15 = 6 - 3x

Step 2: Add 3x to both sides

15x - 15 = 6

Step 3: Add 15 to both sides

15x = 21

Step 4: Divide both sides by 15

x = 7/5