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X+2y+2=0 3x+2y-2=0 by cross multiplication method​

Answer»

Solve by SubstitutionLet's solve your system by substitution.x+2y+2=0;3x+2y−2=0Step: Solvex+2y+2=0for x:x+2y+2=0x+2y+2+−2y=0+−2y(Add -2y to both sides)x+2=−2yx+2+−2=−2y+−2(Add -2 to both sides)x=−2y−2Step: Substitute−2y−2forxin3x+2y−2=0:3x+2y−2=03(−2y−2)+2y−2=0−4y−8=0(SIMPLIFY both sides of the EQUATION)−4y−8+8=0+8(Add 8 to both sides)−4y=8−4y−4=8−4(DIVIDE both sides by -4)y=−2Step: Substitute−2foryinx=−2y−2:x=−2y−2x=(−2)(−2)−2x=2(Simplify both sides of the equation)ANSWER:x=2 and y=−2


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