Question 459739
I am so lost, I understand the concept but not when fractions and decimals are involved please help!
Solve by elimination method, type the solution as an ordered pair.
1) 5x + 5y= -13
7x -2y= 11

2)0.3x-0.2y=4
0.2x+0.3y=5/25
Step 1, change to integers.
0.3x-0.2y=4 x10 --> 3x - 2y = 40
0.2x+0.3y=5/25 x100 --> 20x + 30y = 25
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3)8x -9y=24.5 x2 --> 16x - 18y = 49
7y-2x= -8.5 x2 --> -4x + 14y = -17
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4)0.05x+0.25y=44 x100 (or x20)
0.15x+0.05y=48 x100 (or x20)