Solve 9-4left(3-aright)=2left(a+10right)-1

$$9-4 \left( 3-a \right) = 2 \left( a+10 \right) -1$$

Solve for a

$$a=11$$

Steps for Solving Linear Equation

Use the distributive property to multiply -4 by 3-a.

$$9-12+4a=2\left(a+10\right)-1$$

Subtract 12 from 9 to get -3.

$$-3+4a=2\left(a+10\right)-1$$

Use the distributive property to multiply 2 by a+10.

$$-3+4a=2a+20-1$$

Subtract 1 from 20 to get 19.

$$-3+4a=2a+19$$

Subtract 2a from both sides.

$$-3+4a-2a=19$$

Combine 4a and -2a to get 2a.

$$-3+2a=19$$

Add 3 to both sides.

$$2a=19+3$$

Add 19 and 3 to get 22.

$$2a=22$$

Divide both sides by 2.

$$a=\frac{22}{2}$$

Divide 22 by 2 to get 11.

$$a=11$$