Example 14: If z = f(x, y), where x = u ^ 2 - v ^ 2, y = 2u prove that z xx +z yy = x 4(u^ 2 +v^ 2 ) ( uu +z vv )
y=7x-18
3x+y=2
Avery can finish a puzzle in 28 minutes. If Avery and April work together, they can finish the puzzle in 12 minutes. How long will...
-3x-30=60 find the value of x
0.2151 = 0.0362x -0.1749
Find X
7 2/9 - 3 5/6
x-4y=12
x=6y+2
