We are provided with 3 equations: 1x - 8y +2z+7=0 4x +9z = -3 1x + 6y- 4z= -5 The aim is to use three different methods to solve them. Whenever your answer comes out to be a decimal. Round your submission to 2 decimal digits. Substitution Method We start by attempting to solve the following equations by using the substitution method. We start by solving for one of the variables as a function of the others. We usually look for the simplest of the provided expressions. In this case, it is the second expression. We can solve for either x or z. Let us solve for x: Enter here the obtained expression when solving for a Now replace that value of x in the first equation and in the third equation. The variables in both equations are now y and z. Rearrange the equations and solve the first equation for z: Enter here the obtained expression when solving for z = (-3-9z) 4 Now replace that value of z in the third equation. If you have already replaced x, the only variable left in the equation is y. Rearrange the equations and solve for y: Enter here the obtained value for y= Now that we know how to solve for y, we can easily find z and x. Let us try the second method.