10 + 2a + 2 = 7a -3

10 + 2a – 2a + 2 = 7a – 2a – 3

10 + 2 = 5a – 3

12 = 5a – 3

12 + 3 = 5a – 3 + 3

15 = 5a

15 divided by 5 = 5 divided by 5a

3 = a

10+4A+2=7A-3

The first step is to add the 10 and the 2.

(10+2)+4A=7A-3

12+4A=7A-3

The next step is to place all the known numbers on the same side of the equal sign and the unknown on the other.

Move the +7A to the right side of the equal sign and move the -3 to the left side and change their + or – signs.

+4A becomes -4A, and the -3 becomes +3

12+3=7A-4A

15=3A

A = 15/3

A =15 divided by 3

A = 5

To prove the equasion, substitut the number 5 for the A’s.

10+4A+2=7A-3

10+(4 times 5)+2 = (7 times 5) -3

10+20+2 = 35-3

32=32

10+4a+2=7a-3

12+4a=7a-3

9= 3a

3= a this is wrong, answer is 5, I just miscalculated the – 3. sorry!

10 + 2x2A + 2×1 = 7A – 3

10 + 4A + 2 = 7A – 3 next add together like terms

(10 + 2) + 4A = 7A – 3

12 + 4A = 7A – 3 subtract 7A from both sides (what’s done to one side must be done to the other)

12 + 4A – 7A = 7A -7A – 3

12 – 3A = -3 now subtract 12 from both sides

12 – 12 – 3A = -3 – 12

-3A = -15 now reduce by dividing both sides by -3

(-3A)/-3 = (-15)/-3

A = 5

10+4a+2=7a-3 distribute

12+4a=7a-3 combine like terms

15+4a=7a add 3 to both sides

15=3a sub. 4a frm both sides

15/3=a divide bth sides by 5

5=a answer ☺☻

12+4A=7A-3

12=3A-3

15=3A

5=A

10+4a+2=7a-3

12=3a-3

15=3a

5=a

Please email/IM me with any questions =)

24A+12 = 7A-3

17A = -9

A = -9/17