Solve 2.8=a*2*2+b*2+3

$$2.8 = a \times 2 \times 2 + b \times 2 + 3$$

Solve for a

$$a=-\frac{b}{2}-0.05$$

Steps for Solving Linear Equation

Multiply 2 and 2 to get 4.

$$2.8=a\times 4+b\times 2+3$$

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

$$a\times 4+b\times 2+3=2.8$$

Subtract b\times 2 from both sides.

$$a\times 4+3=2.8-b\times 2$$

Subtract 3 from both sides.

$$a\times 4=2.8-b\times 2-3$$

Multiply -1 and 2 to get -2.

$$a\times 4=2.8-2b-3$$

Subtract 3 from 2.8 to get -0.2.

$$a\times 4=-0.2-2b$$

The equation is in standard form.

$$4a=-2b-0.2$$

Divide both sides by 4.

$$\frac{4a}{4}=\frac{-2b-0.2}{4}$$

Dividing by 4 undoes the multiplication by 4.

$$a=\frac{-2b-0.2}{4}$$

Divide -0.2-2b by 4.

$$a=-\frac{b}{2}-\frac{1}{20}$$

Solve for b

$$b=-2a-0.1$$

Steps for Solving Linear Equation

Multiply 2 and 2 to get 4.

$$2.8=a\times 4+b\times 2+3$$

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

$$a\times 4+b\times 2+3=2.8$$

Subtract a\times 4 from both sides.

$$b\times 2+3=2.8-a\times 4$$

Subtract 3 from both sides.

$$b\times 2=2.8-a\times 4-3$$

Multiply -1 and 4 to get -4.

$$b\times 2=2.8-4a-3$$

Subtract 3 from 2.8 to get -0.2.

$$b\times 2=-0.2-4a$$

The equation is in standard form.

$$2b=-4a-0.2$$

Divide both sides by 2.

$$\frac{2b}{2}=\frac{-4a-0.2}{2}$$

Dividing by 2 undoes the multiplication by 2.

$$b=\frac{-4a-0.2}{2}$$

Divide -0.2-4a by 2.

$$b=-2a-\frac{1}{10}$$