How do you solve #3y = -(1/2)x + 2# and #y = -x + 9# using substitution?
The minus signs cancel each other
Substituting a formula into another essentially means, to set one formula equal to a variable and then inserting the formula into the other formula. Though this might seem complicated, this can be done easily with these equations:
Now rearrange the equation to collect like terms on either sides.
1) multiply both sides of the equation by 2 to simplify the situation.
4) now divide both sides of the equation by
Now just use this value in one of the initial equations.