2x + y = 7
y = x + 1
when the expression x+1 is substituted in for y in the first equation, the result is

x + 1 = 7
2x + 1 = 7
3x + 1 = 7

Adifferent website gives the cost for the first train as £56.88 and the second train as £20.11 with a £9.50 charge for cycle storage for the whole trip. how much would the journey cost you?

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28

Could somebody me with this radical simplification?