solve the system of equations:
-0.4x+0.8y = 1.6
0.2x + 0.3y = 2.2

Question

solve the system of equations:
-0.4x+0.8y = 1.6
0.2x + 0.3y = 2.2

anonymous · Answer

x=2y−4 
x=11−1.5y

anonymous · Answer

did you rearrange the equation?

anonymous · Answer

this is what I did for the second one:

0.2x+0.3y=2.2

 Since 0.3y does not contain the variable to solve for, move it to the right-hand side of the equation by subtracting 0.3y from both sides. 

0.2x=−0.3y+2.2

 Move all terms not containing x to the right-hand side of the equation. 

0.2x=2.2−0.3y

Divide each term in the equation by 0.2.

0.2x0.2=2.20.2−0.3y0.2

 Simplify the left-hand side of the equation by canceling the common factors. 

x=2.20.2−0.3y0.2

 Simplify the equation.