Answer:
7x + 15y
Step-by-step explanation:
4x+ 3 ( 5y + x)
Step 1: remove the brackets by multiplying 3 with (5y + x)
4x+ 15y + 3x
Step 2: add the 4x and 3x
[tex]=7x+15y[/tex]
[tex]4x+3\left(5y+x\right)[/tex]
[tex]3(5y+x)[/tex]
[tex]15y+3x[/tex]
[tex]=4x+15y+3x[/tex]
[tex]4x+15y+3x[/tex]
[tex]7x+15y[/tex]
