Step-by-step explanation:
a. (0.60x + 0.70y)- 50 = 10
<=> 0.60x + 0.70y = 60
b. (x+y) = 5(x-y)
x+y=5x-5y
<=> 4x - 6y = 0
Answer:
Step-by-step explanation:
the last one
8 + 13 + 14 + 7 = 42
Chinese = 8/42
Simplified = 4/21
Answer:
m=

Step-by-step explanation:
Slope of a line is the co efficient of x in the given line.

Answer:
X=5
Step-by-step explanation:
2X+7=5X-8
7=3X-8
15=3X
5=X