Your proportion should look something like this

After cross multiplication, you should end up with this equation

After dividing 4 on both sides, you should get that x=9
Answer:
6.
Step-by-step explanation:
If each assignment is worth -3, you can divide 18 (amount of points changed) by 3 (each assignment's affect) to get 6.
Answer: all real numbers
Step-by-step explanation:
7a + 1 = 8a - a + 1
7a + 1 = 7a + 1
a = all real numbers
Answer:
No solution
Step-by-step explanation:
Step 1: Write equation
-6(3 + x) + 2(3x + 5) = 0
Step 2: Solve for <em>x</em>
<u>Distribute:</u> -18 - 6x + 6x + 10 = 0
<u>Combine like terms:</u> -8 ≠ 0
∴ No solution
Answer:
13 petunias
Step-by-step explanation:
13x7=91
9x8=72
add them and you get 163