What is the first step in solving this system of equations by Substitution?

x = y = 3

y = x + 5

Which is the product of 58 and 1,000? a. 0.058 b. 5,800 c. 58,000 d. 580,000

Find parametric equations for the line tangent to the curve of intersection of the surfaces at the given point. surfaces: xsquared2plus+2yplus+2zequals=1212 yequals=33 point: left parenthesis 1 comma 3 comma five halves right parenthesis

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18