7x+(x-4)(X+5)-5x
7x+(X*2+ 5x-4x-20)-5x
7x+(X*2+ x-20)-5x
X*2+3x-20
To do this you need to know simultaneous equations (which i don’t know if you have learnt it) but this is really hard to explain by words so i hope you can understand by the working out i did
Answer:
x = 0.27
Step-by-step explanation:
Given:
x÷0.4=2 1/9 ÷3 1/6
To Find:
x = ?
Solution:
First we will see what is

Now the final equation is

x = 0.27