2 answers:
Answer:
x = 6 y = 15
Step-by-step explanation:
If this is simultaneous equations
x+y=21
3x-2y= -12
-3(x+y=21)
1(3x-2y= -12)
-3x -3y= -63
3x-2y= -12
-5y= -75
y= -75/-5
y= 15
x+y=21
x+15=21
x=21-15
x=6
This is the answer !!!!!!!!!!!
You might be interested in
Answer:
a= -3, b= -5, c= -1
Step-by-step explanation:
Quadratic Equation: 
Hope this helps!
17 pieces can be cut because you have to divide 12 3/4 by 3/4
Answer:
s = 15 over 2 (15/2 fraction) or 7.5
20 different combinations.
The answer is 2/8 and 4/12 because if you times the 1/4 equation by 2 you would get 2/8 and then times 1/4 by 3 then you would get 4/12
