A.
x/7 + x/7 =4
Calculate the sum
2/7x=4
multiply both sides of the equation by 7/2
x=14
b. 2x/3 - x/3 =4
Multiply both sides of the equation by 3
2x-x=12
collect like terms
x=12
c. 4x/5 - 2x/5 =7
Multiply both sides of the equation by 5
4x-2x=35
Collect like terms
2x=35
Divide both sides of the equation by 2
x= 35/2
d. x/6 + x/4 =3
Multiply both sides of the equation by 12
2x+3x=36
Collect like terms
5x=36
Divide both sides by five
x = 36/5
e. -x/-5 + x/4 =2
Multiply both sides by 20
-4x+5x=40
Collect like terms
x=40
f. x/3 - x/6 = 5
Multiply both sides by six
2x-x=30
Collect like terms
x=30
hope this helps!!
~lyndee