3a+2b=3(4)+2(9)

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Solution for 3a+2b=3(4)+2(9) equation:


Simplifying
3a + 2b = 3(4) + 2(9)

Multiply 3 * 4
3a + 2b = 12 + 2(9)

Multiply 2 * 9
3a + 2b = 12 + 18

Combine like terms: 12 + 18 = 30
3a + 2b = 30

Solving
3a + 2b = 30

Solving for variable 'a'.

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

Add '-2b' to each side of the equation.
3a + 2b + -2b = 30 + -2b

Combine like terms: 2b + -2b = 0
3a + 0 = 30 + -2b
3a = 30 + -2b

Divide each side by '3'.
a = 10 + -0.6666666667b

Simplifying
a = 10 + -0.6666666667b

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