Answer:
x = -4
Step-by-step explanation:
Multiply both sides by 2. Move constant to the right-hand side and change the sign. Add the numbers. And change the signs on both sides of the equation.
Answer:
420
Step-by-step explanation:
Simple addition! I double checked!
7 because 42 divided by 6= 7 and length times width = perimeter
Answer:
Step-by-step explanation:

Answer:
A
Step-by-step explanation:
test the constant 1/2 + (1/2)*(-3) = -2/2 = -1