Which expressions are equivalent? 3x + 5x and 8x 3(x + 4) and 3x + 12 a + b + a and 2a + b 18x + 2y and 15x + 3x + 2x 3a + 4a + 10 and 17a

3x+5x and 8x, 3(x+4) and 3x+12, a+b+a and 2a+b

Step-by-step explanation:

3x+5x is equal to 8x, so they're equivalent

3(x+4) is also equal to 3x+12 when you use the distributive property

a+b+a is also equivalent 2a+b

1.3

step-by-step explanation:

3x2=6   9x+6

bring down the 6 on both sides

6+6=12

12= 9x

divide by 9

12/9 =

1.3 =x

not sure but it may be b, as i said i'm not sure.