Answer:
3*(5*x-7)-(15*x-21)=0
Step-by-step explanation:
3 • (5x - 7) - (15x - 21) = 0
Step 2 :
Equation at the end of step 2 :
0 = 0
Step 3 :
Equations which are always true :
Answer:
correct
Step-by-step explanation:
if you are dividing between two numbers and one of them is negative, then the answer is negative. If there are two negatives being divided, on the other hand, they will cancel out and the quotient will be positive. It's the same way for multiplication
Answer:
angle b is 62 degrees. This is because if we solve for x, by putting the 2 equations equal to each other(because they are vertical angles), than we figure out that x=6. Now plug that into angle b's equation, and you get 62 degrees.
Step-by-step explanation:
Answer:
18
Step-by-step explanation:
2 people = 3h
6 people = 3h x 6 =18
3-2(2x+2)-(4x+2)
Pretend that there is a -1 in front of the second bracket
3-2(2x+2)-1(4x+2)
Multiply the first bracket by 2
Multiply the second bracket by -1
(-2)(2x)(-2)(2)=-4x-4
(-1)(4x)(-1)(2)= -4x-2
3-4x-4-4x-2
-4x-4x+3-4-2
Do 3-4-2 first
3-4-2
-1-2
=-3
-4x-4x-3
-8x-3
Answer: -8x-3