Solve the following system using substitution:

Question

y = x + 2
y = 3x
I don't understand this question.

Answer 1

Substitute 3x for y in the first equation.

That leaves you with
3x = x + 2
which can be rewritten
2x = 2

Solve that for x.

Then, knowing x, use either equation to get y.

Answer 2

Answer (1,3)

Answer 3

Yes, that is the answer. x = 1 and y = 3

Answer 4

Simplify (d^4)(d^5)^3.

Is it d^27

Answer 5

Yes

Answer 6

Sum of the solutions to
x2 - 3x - 18 = 0

Is it -3 ?

Answer 7

no,
for ax^2 + bx + c = 0, the sum of the roots is -b/a
so the sum is -(-3) = +3