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larisa [96]
3 years ago
8

9. Solve the equation. x + 4 = 3(3x - 4) A 9 4 B 1 C 2 Lounge D 7 4

Mathematics
2 answers:
Alborosie3 years ago
8 0

Answer:

x=2

Step-by-step explanation:

x + 4 = 3(3x - 4)

Distribute

x+4 = 9x -12

Subtract x from each side

x+4 -x = 9x-x-12

4 = 8x-12

Add 12 to each side

4+12 = 8x-12+12

16 = 8x

Divide by 8

16/8 = 8x/8

2 =x

Artist 52 [7]3 years ago
6 0

Answer:

x = 2

Step-by-step explanation:

x + 4 = 3(3x - 4)

Expand the brackets.

x + 4 = 9x - 12

Add -x and 12 on both sides.

4 + 12 = 9x - x

16 = 8x

Divide 8 into both sides.

16/8 = x

2 = x

Switch sides.

x = 2

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