Download 2-step equtions - martzolfmath2011

2-step equtions
to solve: 2 step
1. inverse opperation of adding/subtrction
2. inverse opperation of multiplication/division
3. solve
4. check
combining like terms equations
to solve:
1. combine like terms
2. inverse opperation of add/subtract
3. inverse opperation multi./ division
4. solve
5. check
variables on both sides
to solve:
1. combine like terms by using the opp.
2. solve 2-step equation
3. check
Distributive property
to solve:
1. distribute
2. solve 2-step equation
3. check
examples:
1) 2x-12= 18
+12 +12
2x = 30
2
2
x = 15
2) 8x-4x+16=20
+4x+16=20
-16+-16
4x = 4
4
4
X= 1
2x-12=18
2(15)+12=18
30-12=18
√
ck: 8x-4x+16=20
8(1)-4(1)+16=20
8-4+16=20
20=20
√
3) 6x-10=4x+12
-4x
-4x
2x-10=12
+10 +10
2x= 22
2
2
X=11
ck:
4)
ck: 4(x-2) = 16
4 (6-2) = 16
4(4) = 16
16= 16
√
4 (x-2) = 16
4x- 4(2) = 16
4x- 8 = 16
+8
+8
4x = 24
4
4
X= 6
6x-10 =4x+12
6(11)- 10= 4(11)+12
66-10 = 44+12
56= 56