Question

12x[1]+3x[2]=9
-8x[1]-2x[2]=-6

Answer 1

Use ^ if you're talking about exponents. For example, x squared = x^2

Answer 2

yes but they are at the bottom of the equation so like 12x\[_{1}\]

Answer 3

Okay, so use x and y instead

Answer 4

If x[1] = x and x[2] = y, then:

12x + 3y = 9
-8x - 2y = -6

Solve the system

Answer 5

You should know how to solve it now.