Solve 3=-2.5+a*4.5

$$3 = - 2.5 + a \times 4.5$$

Solve for a

$$a = \frac{11}{9} = 1\frac{2}{9} \approx 1.222222222$$

Steps for Solving Linear Equation

Swap sides so that all variable terms are on the left hand side.

$$-2.5+a\times 4.5=3$$

Add 2.5 to both sides.

$$a\times 4.5=3+2.5$$

Add 3 and 2.5 to get 5.5.

$$a\times 4.5=5.5$$

Divide both sides by 4.5.

$$a=\frac{5.5}{4.5}$$

Expand \frac{5.5}{4.5} by multiplying both numerator and the denominator by 10.

$$a=\frac{55}{45}$$

Reduce the fraction \frac{55}{45} to lowest terms by extracting and canceling out 5.

$$a=\frac{11}{9}$$