- X+3y=-7 -x+y=-8 solva by elimination?

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Find all of the actual roots of the polynomial: x^3 - 2x^2 + 5x + 26 = 0? Could someone help me with these math problems? I can't figure them out. Solve the linear equation;
x+2y=15
y=-2x+0 9x-12y=-3
-12x+16y=4? What do people do when they are fine and everythings good? How do i know what to do now that ive reached my goals? Name a class of annelids whose members may have protonephridia? What can you tell me about the flower of life? Sacred geometry? Where does it come from?