A.)list the 4 steps outlined in the lesson on solving equations. (1 points)

b.)solve each equation and show all work (3 points each)

1.) 5x + 7 = 3x + 21

2.) 3x - 2(5 - x) = -3(x - 10) + 3x

3.) 5(x + 1) = 3(2x + 3) + 5

For this case we must solve the following equations:

We subtract 3x on both sides of the equation:

We subtract 7 on both sides of the equation:

We divide between 2 on both sides of the equation:

The second equation is:

We apply distributive property to the terms of parentheses:

We add common terms:

We add 10 to both sides of the equation:

We divide between 5 on both sides of the equation:

Third equation:

We apply distributive property to the terms within parentheses:

We add similar terms:

We subtract 6x on both sides of the equation:

We subtract 5 on both sides of the equation:

10.416 meters per second

step-by-step explanation:

distance=1 00 meters

time= 9.6 seconds in decimal form or 9 3/5 as a mixed number

average speed= 100/9.6

=10.416 meters per second or 10 52/125 as a mixed number.