7a+.3b=40

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Solution for 7a+.3b=40 equation:


Simplifying
7a + 0.3b = 40

Solving
7a + 0.3b = 40

Solving for variable 'a'.

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

Add '-0.3b' to each side of the equation.
7a + 0.3b + -0.3b = 40 + -0.3b

Combine like terms: 0.3b + -0.3b = 0.0
7a + 0.0 = 40 + -0.3b
7a = 40 + -0.3b

Divide each side by '7'.
a = 5.714285714 + -0.04285714286b

Simplifying
a = 5.714285714 + -0.04285714286b

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