math

posted by Abby

Could someone help me solves these questions? And can you show me how you did it? I can't figure out how to do these ones... I would really appreciate any help.
Questions~~
~ 3x – 19 = -2

~ 4x - 12x = 62 + 4(11)

~ x/8 + 7 = - 10

~ 4(5x – 9) = -2(3x + 7)

~ ½ x – 5 = (-3/8)x + 2

~ 3(x – 4) – (x + 5) = 2x + 11

1. Ms. Sue

If you show us how you would do the first problem, we can help you with the others.

2. Abby

3x – 19 = -2
Add ‘19’ to each side of the equation ~ -19+19+3x= -2+19

Combine like terms~ -19+19=0
0+3x= -2+19
3x= -2+19

Combine like terms~ -2+19=17
3x=17

Divide each side by‘3’~ x=5.666666667
X = 5.666666667

3. Ms. Sue

Good.

4. Abby

2. 4x - 12x = 62 + 4(11)
Combine like terms ~ 4x+-12x=-8x
-8x= 62+4(11)
Multiply ~ 4*11
-8x=62+44
Combine like terms ~ 62+44=106
-8x=106
Divide each side by ‘-8’ X=-13.25
X= -13.25

3. x/8 + 7 = - 10
?? I can't figure this out

4. 4(5x – 9) = -2(3x + 7)
Add ‘6x’to each side of the equation ~ -36+20x+6x= -14+ -6x+6x
Combine like terms ~ 20x +6x=26x
-36+26x=-14+ -6x+6x
Combine like terms ~ -6x+6x=0
-36+26x= -14+0
-36+26=-14
Add ‘36’ to each side of the equation ~ -36+36+26x=-14+36
Combine like terms ~ -36+36=0
0+26x= -14+36
26x= -14+36
Combine like terms ~ -14+36=22
26x=22
Divide each side by ‘26’ ~ x= 0.8461538462
x= 0.8461538462

5. ½ x – 5 = (-3/8)x + 2
?? I can't figure this one out

6. 3(x – 4) – (x + 5) = 2x + 11
Combine like terms ~ -12+ -5= -17
-17+3x+ -1x=2x+11
Combine like terms ~ 3x+ -1x=2x
-17+2x=2x+11
Add ‘-2x’ to each side of the equation
-17+2x+-2x=11+2x+-2x
Combine like terms~ 2x+ -2x=0
-17+0=11+2x+-2x
-17=11+2x+-2x
Combine like terms~ 2x+ -2x=0
-17+11+0
-17=11

Could you please show me how to do #3 and #5?

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