Answer:
Malik substituted 60 for y instead of x
Step-by-step explanation:
The complete question is
Malik’s solution to the equation ,2/5x-4y=10 when x=60, is shown below.what error did Malik make first when solving the equation ?
Options are
malik did not multiply correctly. malik added 240 to each side of the equation. malik did not multiply correctly. malik substituted 60 for y instead of x
Malik’s solution is
[tex]\frac{2}{5}x-4(60)=10\\\frac{2}{5}x=10+240\\\frac{2}{5}x=250\\x=625[/tex]
we have
[tex]\frac{2}{5}x-4y=10[/tex]
For x=60
substitute the value of x in the equation and solve for y
[tex]\frac{2}{5}(60)-4y=10[/tex]
[tex]24-4y=10[/tex]
[tex]4y=24-10[/tex]
[tex]4y=14[/tex]
[tex]y=\frac{14}{4}\\\\ y=\frac{7}{2}[/tex]
therefore
Malik substituted 60 for y instead of x
