Which equation has exactly ONE solution? A)
3 + 4x
= 2x + 1
2
B)
6 - 2x
= 15 + 2x
12x - 10
= 3x + 4
4
D)
4x - 20
-= x-5
4

its A

Step-by-step explanation:

Let's solve your equation step-by-step.

3+4x=2x+12

Step 1: Simplify both sides of the equation.

4x+3=2x+12

Step 2: Subtract 2x from both sides.

4x+3−2x=2x+12−2x

2x+3=12

Step 3: Subtract 3 from both sides.

2x+3−3=12−3

2x=9

Step 4: Divide both sides by 2.

2x

2

=

9

2

x=

9

2

x=

9

2

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a is the correct