it means two times x times y.
Yes, because the equation is linear, there is only one solution:4x - 3 = 12 +2x4x - 2x = 12 + 32x = 15x = 7.5There is no other solution
1/(x-5) = 4/(2x)4(x-5) = 2x4x - 20 = 2x2x = 20x = 10_______________________________Check:1/(10-5) ?=? 4/(2x10)1/5 ?=? 4/201/5 = 1/5 yay!