Question

gostaria dos calculos

Answer 1

$a) 2x - 3.5 = 20 \\ 2x-15=20 \\ 2x=35 \\ x=35/2 = 17,5 \\ \\ b)2.1 -3y =20 \\ 2-3y=20 \\ -3y=18 \\ -y=6 \\ y=-6 \\ \\ c)2x-3.0,5=20 \\ 2x-1,5=20 \\ 2x=21,5 \\ x=21,5/2=10,75 \\ \\ d)2. \frac{3}{4} -3y=20 \\ \frac{3}{2} -3y=20 \\ 3-6y=40 \\ -6y=37 \\ y=-37/6 \\ y=6,1..$