Question

if y=x/2 and 3x+4y=20 then x =__​

Answer 1

Answer:

4

Step-by-step explanation:

$3x + 4y = 20 \\ 3x + 4(x \div 2) = 20 \\ 3x + 2x = 20 \\ x = 20 \div 5 \\ x = 4$

Answer 2

Answer:

x=4

Step-by-step explanation:

y=x÷2 then 3x+4x÷2=20 3x+2y=20 5x=20 x=20÷5 then x=4