x = 0
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2x + 1 = 1x + 11Subtract 1x from each side:1x + 1 = 11Subtract 1 from each side:1x = 10
There is always a 1 in front of the x but the 1 is invisible so it same as 1x + 1x = 2x x + x = 2x
x would equal -1 and y would equal 1
8x-1 = 7x+2 Add 1 to both sides: 8x = 7x+3 Subtract 7x from both sides: 1x = 3 ie x = 3
X2 + 10X - 11 = 0What two factors of - 11 add up to 10 ?(X - 1)(X + 11)==========X = 1X = - 11