SOLUTION: Evaluate 10(x + y)and10 +10y, when x =20 and y =4 Solve x + 2 = 6 solve using multiplication principles 7x = -49 Solve 5x + 7x = 72

Algebra ->  Numeric Fractions Calculators, Lesson and Practice -> SOLUTION: Evaluate 10(x + y)and10 +10y, when x =20 and y =4 Solve x + 2 = 6 solve using multiplication principles 7x = -49 Solve 5x + 7x = 72       Log On


   

Question 808579: Evaluate 10(x + y)and10 +10y, when x =20 and y =4
Solve x + 2 = 6
solve using multiplication principles 7x = -49
Solve 5x + 7x = 72

Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
10(x + y)and10 +10y
10x + 10y = 10*20 + 10*4
= 240.
............
10 + 10y = 10 + 10(4)
= 50
............
x + 2 = 6
x = 6 - 2
x = 4
........
7x = -49
x = -49/7
x = -7
..........
5x + 7x = 72
12x = 72
x = 72/12
x = 6
...........
Hope this helps.
:-)