2(x - 10) = 3x - 4 Let's find out if the answer is a.) 1 by substituting 1 for x in 2(x - 10) = 3x - 4 2(1 - 10) = 3(1) - 4 2(-9) = 3 - 4 -18 = -1 No that's false. So the answer is not a.) 1 ---------------------------------------------- Now let's find out if the answer is b.) -1 by substituting -1 for x in 2(x - 10) = 3x - 4 2(-1 - 10) = 3(-1) - 4 2(-11) = -3 - 4 -22 = -7 No that's false. So the answer is not b.) -1 ---------------------------------------------- Now let's find out if the answer is c.) -6 by substituting -6 for x in 2(x - 10) = 3x - 4 2(-6 - 10) = 3(-6) - 4 2(-16) = -18 - 4 -32 = -22 No that's false. So the answer is not c.) -6 ---------------------------------------------- Now let's find out if the answer is d.) -16 by substituting -16 for x in 2(x - 10) = 3x - 4 2(-16 - 10) = 3(-16) - 4 2(-26) = -48 - 4 -52 = -52 Yes that's true! So the answer is d.) -16 Edwin