-10x+3 = -x+12 -10x+x = 12-3 -9x = 9 x = -1
7x+3=10x-9(shift +3 & 10x) 7x-10x=-9-3(signs changed) -3x=-12(divide both sides by -3) x=4
6-x+12 = 10x+7 6+12-7 = 10x+x 11 = 11x x = 1
10x+2=12 10x=10 x=1
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-10x+3 = -x+12 -10x+x = 12-3 -9x = 9 x = -1
x2 + 9 = 10x x2 - 10x + 9 = 0. (x - 9)(x - 1) = 0. Therefore, x = 1 or 9.
7x+3=10x-9(shift +3 & 10x) 7x-10x=-9-3(signs changed) -3x=-12(divide both sides by -3) x=4
-10x-6 = -12 -10x = -12+6 -10x = -6 x = 3/5
6-x+12 = 10x+7 6+12-7 = 10x+x 11 = 11x x = 1
10x+2=12 10x=10 x=1
X= 6 10x + 9 = 8x + 21. subtract 8x and 9 to both sides 2x = 12. divide by 2 to both sides x = 6
x2 - 10x - 24= x2 - 12x + 2x - 24= x(x - 12) + 2(x - 12)= (x - 12)(x + 2)
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5x +12 = -78 -10x +10x +10x 15x +12 = -78 -12 -12 15x = -66 /15 /15 x = 4.4
6x - 3x = 5x - 10x + 12 6x - 3x - 5x + 10x = 12 8x = 12 8x/8 = 12/8 x = 12/8 = 3/2 x = 1.5
-12-6x=12-10x we can add 12 to both sides, getting: -6x=24-10x then we can add 10x to both sides: 4x=24 divide both sides by 4: x=6 the answer is x equals 6.