Question

When 4a-9b=22 and b= -2, what is the value of a?

A.-10/3
B.-14/9
C.1
D.4
E.10

Answer 1

a=1

Explanation:

Step 1: Simplify both sides of the equation.

4a+18=22

Step 2: Subtract 18 from both sides.

4a+18−18=22−18

4a=4

Step 3: Divide both sides by 4.

4a /4 = 4 /4

a=1

Answer 2

4a-9b=22

substitute b=-2

4a -9(-2) = 22

4a +18 =22

subtract 18 from each side

4a = 4

divide by 4

a =1

Choice C