If you mean: 7-2x = -23 then the value of x is 15
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The question contains an expression but not an equation (nor inequality). An expression cannot be solved.
2x = 17 then x = 8.5 2x+1=7 then x = 3 2x - 1 = 7 then x = 4 which is your problem
2x+17=6x-23 23+17=6x-2x 40=4x x=40 / 4 therefore x=10
6x-8+2x-5 = 7-2x 6x+2x+2x = 7+8+5 10x = 20 x = 20/10 x = 2
(2x - 7)(x + 1)
The number is -14/23 or -0.6087. Let x = the number Equation: 1/2 * x = 12 * x + 7 multiplying the equation by 2 2(1/2x) = (12x + 7)2 x = 24x + 14 x - 24x = 14 -23x = 14 x = -14/23 or -0.6087 check: 1/2 * x = 12 * x + 7 1/2 (-14/23) = 12 (-14/23) + 7 -14/46 = -168/23 + 161/23 -7/23 = -7/23