Solve the simultaneous equations X=y+1 and X+2y=7

Answer 1

To solve these simultaneous equations, we can substitute the value of X in the second equation from the first equation.

From the first equation, X = y + 1

Substitute this into the second equation:

(y + 1) + 2y = 7
y + 1 + 2y = 7
3y + 1 = 7
3y = 6
y = 2

Now substitute the value of y back into the first equation to find X:

X = y + 1
X = 2 + 1
X = 3

Therefore, the solutions to the simultaneous equations X=y+1 and X+2y=7 are X = 3, y = 2.