3. What is the x-coordinate of the solution of the following system? ) 3x+10y=1 x+2y=-1

To find the -coordinate of the solution to the system of equations: we can use the method of substitution or elimination. Here, we will use the elimination method.First, let's multiply the second equation by 3 to align the coefficients of : This simplifies to: Now, we have the following system of equations: Next, subtract the second equation from the first equation to eliminate : Simplifying this, we get: Solving for : Now that we have , substitute this value back into the second original equation to solve for : Simplify and solve for : Therefore, the -coordinate of the solution is: