There is actually 2 ways to solve this, I will show you both.
The first is obvious, solve for x in the first one, and plug it into the 2nd one and get the answer
4x + 7 = 12
4x = 5
x = 
8() + 3
2 * 5 + 3
10 + 3
13
The 2nd option is to manipulate the 4x + 7 to be 8x + 3
4x + 7 = 12
start by moving the 7 over
4x = 5
multiply both sides by 2
8x = 10
and add 3 to both sides
8x + 3 = 13
Black = 2*3 = 6 cars;
Blue = 2*2*3 = 12 cars;
Red = cars;
White = 2*9 = 18 cars;
The number of each colour car is a factor of 36( blue, red, white);
black + blue + red + white = 45 cars.
Hello,
1) Answer C
10xy+3y+20ax+6a=y(10x+3)+2a(10x+3)
=(10x+3)(y+2a)
2) Answer A
5ab+3ay+5b+3y=a(5b+3y)+1(5b+3y)
=(5b+3y)(a+1)
Answer:
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Step-by-step explanation:
so basically idk how to type it on a computer but 4 dots then under those four dots, 2 dots and a line under it
Step-by-step explanation:
this is your answer. make sure that you construct a scale diagram.
