Answer:
Step-by-step explanation:
You want x alone on the left side.
x is being multiplied by 3 and by c.
The opposite operation of multiplication is division. You must divide 3xc by 3c to end up with just x.
You must do the same operation to both sides of an equation, so divide both sides by 3c.
Divide both sides by 3c.
Simplify both sides.
Answer:
4r^3+8r^2-5r-10
= 4r^2(r+2)-5(r+2) [Factorise out like terms; distributive law of multiplication to check]
=(4r^2-5)(r+2) [Combine expressions]
Answer:
2y-10
Step-by-step explanation:
-2(7-y)+4
distribute:
=(-2)(7)+(-2)(-y)+4
= -14+2y+4
Combine like terms:
= -14+2y+4
=(2y)+(-14+4)
= 2y+-10
Answer:
(-6, 9/2)
Step-by-step explanation:
-2+-10/2 = -6
-1+10/2 = 9/2
