SOLUTION: 6(3x -5) - 9x if x=4 4- 8(-2 - 6t) if t=-1 -3s + 2(-5s + 1) is s=-3 -7(x + 6) + 12 if x=7 4(8 + 5u) + 2u if u=-2 -5 - 3(4 - r) if r=9 7 - 6 (-8 + 2n) + n if n=-6

Algebra ->  Distributive-associative-commutative-properties -> SOLUTION: 6(3x -5) - 9x if x=4 4- 8(-2 - 6t) if t=-1 -3s + 2(-5s + 1) is s=-3 -7(x + 6) + 12 if x=7 4(8 + 5u) + 2u if u=-2 -5 - 3(4 - r) if r=9 7 - 6 (-8 + 2n) + n if n=-6      Log On


   

Question 513499: 6(3x -5) - 9x if x=4
4- 8(-2 - 6t) if t=-1
-3s + 2(-5s + 1) is s=-3
-7(x + 6) + 12 if x=7
4(8 + 5u) + 2u if u=-2
-5 - 3(4 - r) if r=9
7 - 6 (-8 + 2n) + n if n=-6
Answer by micahpuff(13) About Me  (Show Source):
You can put this solution on YOUR website!
1. 6(3x -5) - 9x if x=4
2. 4- 8(-2 - 6t) if t=-1
3. -3s + 2(-5s + 1) is s=-3
4. -7(x + 6) + 12 if x=7
5. 4(8 + 5u) + 2u if u=-2
6. -5 - 3(4 - r) if r=9
7. 7 - 6 (-8 + 2n) + n if n=-6

substitute everything first.
1. substitute 4 for x;
6(3(4)-5)-9(4)
6(12-5)-36
42-36
=6
2. substitute -1 for t;
4- 8(-2 - 6t)
4-8(-2-6(-1))
4-8(-2+6)
4-8(4)
4-32
=-28
3. substitute -3 for s;
-3s + 2(-5s + 1)
-3(-3)+2(-5(-3)+1)
9+2(15+1)
9+2(16)
9+32
=41
4. substitute 7 for x;
-7(x + 6) + 12
-7(7+6)+12
-7(13)+12
-91+12
=-79
5. substitute -2 for u;
4(8 + 5u) + 2u
4(8+5(-2))+2(-2)
4(8-10)-4
4(-2)-4
-8-4
=-12
6. substitute 9 for r;
-5 - 3(4 - r)
-5-3(4-9)
-5-3(-5)
-5+15
=10
7. substitute -6 for n;
7 - 6 (-8 + 2n) + n
7-6(-8+2(-6))+(-6)
7-6(-8-12)+(-6)
7-6(-20)+(-6)
7+120+(-6)
=121