You do not. If you reduce 64:60, you will get 16:15 which is not the same as 16:4
Just use the coefficients for each variable and put it in a matrix. Is the second question set equal to something? Because then you would put it in place as the question mark. (Did the pic come through?)
So the 3x3 matrix is made up of the coefficients and then to augment the matrix, you add another column at the end with the solutions. Good luck!
Answer:
=
Step-by-step explanation:
4(p+1.25)=725
divide by 4
p+1.25= 131.25
subtract 1.25 both sides
p = 130
hope it helps!!
Step-by-step explanation:
the answer is in the above image