Do you mean that Bob's total is equal to Luis's total? If so then the solution for x is: 7x-5 = 2x+15 7x-2x = 15+5 5x = 20 x = 4
If: 11x+25 = 7x+15 then there is only one solution and it is x = -2.5
the empty set.
20 + 7x
8+7x = 20+3x 7x-3x = 20-8 4x = 12 x = 3
7x-5+2x=3-4x+12 7x+2x-5=3+12-4x 9x-5=15-4x 9x+4x-5=15-4x+4x 13x-5=15 13x-5+5=15+5 13x=20 13x/13=20/13 x=20/13
4x + 8 + 7x + 12 = 11x + 20
7x+17 = 45 7x = 45-17 7x = 28 x = 4
If you mean: 7x-3+5x+15 = 180 then the value of x works out as 14
2x2 + 7x - 15 = (2x - 3)(x + 5)
It is a linear equation in x. 10x = 7x + 15 3x = 15 x = 5
7x + 1 = 20 7x = 19 x = 19/7 x = 2.714285 recurring (that is, 2.714285714285..)