Year 1 Homework #23

Name ________________________

1). (1 point each) Evaluate the following expressions. First rewrite the expression with the value of X substituted for X. Then simplify it down to one number. I will rewrite the first expression for you:

a). X2 - 1 for X = 8

Substitute: 82 - 1

Simplify: _______



 b). 3X2 + 2 for X = 4



_______



 c). 80 - X2 for X = 8



_______



 d). X2 + X - 4 for X = 3



_______



2). (1 point each) Combine all like terms (X's with X's) and solve these equations. Rewrite the equation with all the X's together first. I will rewrite the first equation for you!

a). X + X + X + X = 48

Equation: 4X = 48

X = _______



b). X + 2X + X + X = 30

Equation:_________________

X = ___________________



 c). X + 2X + 2X + X = 42

Equation:_________________

X = ___________________



d). 3X + 5X = 64

Equation:_________________

X = ___________________



 e). 5X - 3X = 20

Equation:_________________

X = ___________________



 f). 2X + 6X - 3X = 35

Equation:_________________

X = ___________________



g). 5X - 3X + 2 = 18

Equation:_________________

X = ___________________

 h). X + 2X + 13 - X - 8 = 23

Equation:_________________

X = ___________________