ANSWER
The solution is 
EXPLANATION
We want to solve the simultaneous equations

and
.
We substitute equation (2) in to equation (1), to obtain

This has now become a linear equation in a single variable
.
We solve for x by grouping like terms.


We divide through by negative 3 to get;
.
Hence, the solution is 
Answer: -4, -5
Step-by-step explanation:
I just did it
Answer: blue triangle: 53 - red triangle: 17
Step-by-step explanation:
12+2+7\left(3\right)+7+5\left(3\right)-4
12+2+21+7+5\left(3\right)-4
12+2+21+7+15-4
53
3+3+6-5+3+7
0.6, 0.3 2/5, 1/3 1/2 ( I believe)
Step-by-step explanation:
good luck !!!
Answer:
x = 7, -5
Step-by-step explanation: