HELP ASAP Solve the system of equations
X + 3y = -20 and -4x - 4y=0 by combining the equations

x=10 and y=-10

Step-by-step explanation:

first pick for what you want to solve for first, in this case I picked y

so I put them for subtraction and i hade to multiply the first equation by 4 so I could cancel my X's and I just solved for y

then I plugged in my answer to the first equation, you can pick any of the 2 equations, and I solved for x

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

b.-4 units

all you   do is count how many times you move