Cost of the toothbrush and the toothpaste together = $1.10 Let us assume the cost of the toothpaste = x Then The cost of the toothbrush is = (x + 1) dollar Then we can write the equation as x + x+ 1 = 1.10 2x + 1 = 1.10 2x = 1.10 - 1 2x = 0.10 x = 0.10/2 = .05 dollars So the cost of the toothpaste is 0.05 dollars.<span>I hope
the procedure is clear to you.</span>