3 years ago

How to solve this? 0.5x+y=1.5 and 0.8x-0.2y=6

Mathematics

1 answer:

zavuch27 [327]3 years ago

8 0

Step-by-step explanation:

Step 1 : 0.5x + y = 1.5

0.8x - 0.2y =6

Step 2 : y = 1.5 - 0.5x

0.8x - 0.2 ( 1.5 - 0.5x ) = 6

Step 3 : y = 1.5 - 0.5x

0.8x - 0.3 + 0.1x = 6

Step 4 : y = 1.5 - 0.5x

0.9x = 6.3

Step 5 : y = 1.5 - 0.5* 7

x = 7 ( put 7 into the x value above )

Ans: y = -2

x = 7

You can ask me if you don't understand any step^^

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