What is the solution of the system of equations? y= -3x+8
y= -5x-2
2 answers:
Y = -3x+8 y = -5x-2 ------------ y = 5(-3x+8) y = 3(-5x-2) --------------- y = -15x+40 y = -15x-6 -------------- y = -15x+40 - - y = -15x-6 -------------- y = 46 <span> y = -3x+8 </span>46 = -3x+8 -8 -8 --------------- 38 = -3x ---- ---- -3 -3 12.666...=x (<span>12.666.,46) </span>← Answer
Remember you can do anything to an equation as long as you do it to both sides notice that they both equatl y therefor they are equal -3x+8=y=-5x-2 -3x+8=-5x-2 add 5x to both sides 2x+8=-2 minus 8 from both sides 2x=-10 divide by 2 x=-5 plug in -5 for x in any equation to evaluate y y=-3x+8 y=-3(-5)+8 y=15+8 y=23 the solution is x=-5 y=23 (-5,23)
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