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g100num [7]
3 years ago
10

A bag contains blue marbles and red marbles, 66 in total. The number of blue marbles is 9 less than 4 times the number of red ma

rbles. How many blue marbles are there?

Mathematics
2 answers:
Westkost [7]3 years ago
3 0
51 blue marbles is the answer
Sladkaya [172]3 years ago
3 0
X is the blue marbles and y is the red marbles.

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Variable termes X-12-3X+22
adell [148]

Answer: x + 12 = 3x + -22

12 + x = 3x + -22

Reorder the terms:

12 + x = -22 + 3x

Solving

12 + x = -22 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.

12 + x + -3x = -22 + 3x + -3x

Combine like terms: x + -3x = -2x

12 + -2x = -22 + 3x + -3x

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

12 + -2x = -22 + 0

12 + -2x = -22

Add '-12' to each side of the equation.

12 + -12 + -2x = -22 + -12

Combine like terms: 12 + -12 = 0

0 + -2x = -22 + -12

-2x = -22 + -12

Combine like terms: -22 + -12 = -34

-2x = -34

Divide each side by '-2'.

x = 17

Simplifying

x = 17

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