Dive into the world of knowledge and get your queries resolved at IDNLearn.com. Get the information you need from our experts, who provide reliable and detailed answers to all your questions.

find the solution for these equation y=2x-4 y=-2/3+4

Sagot :

[tex]\begin{gathered} y\text{ = 2x - 4}-----(1) \\ y\text{ = }\frac{2}{3}x\text{ + 4}-----(2) \\ \text{from equation 1.} \\ y-2x\text{ = -4------(5)} \\ y-\frac{2x}{3}\text{ = 4-------(6)} \\ \text{solving equation 5 \& 6 by subtarcting equation 6 from equation 5, }y,\text{ will be eliminated} \\ y-2x\text{ = -4} \\ -(y-\frac{2x}{3}\text{ = 4)} \\ -2x\text{ + }\frac{2x}{3}\text{ = -8}------(7) \\ multiply\text{ equation (7) by the L.C.M, which is }3 \\ -2x(3)\text{ + }\frac{2x}{3}(3)\text{ = -8(3)} \\ -6x\text{ + 2}x\text{ = -24} \\ -4x\text{ = -24} \\ x\text{ = }\frac{24}{4}\text{ = 6} \\ \text{substitute }x\text{ into the equation }(5) \\ y-2x\text{ = -4} \\ y\text{ -2(6) = -4} \\ y\text{ - 12 = -4} \\ y\text{ = -4 + 12 = 8} \\ x\text{ = 6, y = 8} \end{gathered}[/tex]