Qual o valor de X nas frações abaixo: a) x/3 - 5 = 0 b) x/2 + 3x/5 = 6 c) x/5 + x/2 = 7/10 d) x/6 + x/3 = 18 - x/4

a) x/3 - 5 = 0 x/3 = 5 x = 15 b) x/2 + 3x/5 = 6 5x/10 + 6x/10 = 6 11x/10 = 6 x = 60/11 c) x/5 + x/2 = 7/10 4x/10 + 5x/10 = 7/10 9x/10 = 7/10 x = 7/10 * 10/9 x = 7/9 d) x/6 + x/3 = 18 - x/4 2x/6 + 4x/12 = 72/4 - 3x/12 3x/12 + x/3 = 18 - x/4 x/4 + x/3 = 18 - x/4 7x/12 = 18 - x/4 28x/48 + 12x/48 = 54/48 + 12x/48 40x/48 = 54/48 + 12x/48 28x/48 = 54/48 x = 54/48 * 48/28 x = 27/14