A) 10=4+3(t+5) b) 28=4+3(t+5) c) 0=16+4(m-6)

t=-3  t=3 m=2

Step-by-step explanation:

a. 10=4+3(t+5)

3xt      3x5

10=4+3t+15

4+15

10=3t+19

-19    -19

-9=3   -9/3

-3=t

b. 28=4+3(t+5)

3xt  3x5

28=4+3t+15

4+15

28=3t+19

-19       -19

9=3t   9/3

3=t

c. 0=16+4(m-6)

4xm 4x-6

0=16+4m-24

16-24

0=4m-8

+8    +8

8=4m    8/4

2=m

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116