Respuesta :

b=7a+14
Might help not sure if it’s correct
zarrinahmed07
So first we want to plug in The equation for b

10a+4(7a+14)=18

(we use the distributive since we have 4 times of b)

when we solve it, we get a is -1

plug in -1 for a

7(-1)+14=7

b=7

plug it back in

10(-1)+4(7)=18

18=18

Hope this helps! :)