Question

solve by the elimination method
0.05x+0.25y=11
0.15x+0.05y=12

Answer 1

0.05x+0.25y=11---(a)
0.15x+0.05y=12---(b)

multiply equation (a) with 3 u get
0.15x+0.75y=33---(c)
subtract eqn (b) from (c)

0.15x+0.75y=33---(c)
(-) 0.15x+0.05y=12---(b)
----------------------
0 + 0.70y = 21
0.70y =21
y=21-0.70 = 30

put y= 30 in (a)
0.05x+0.25(30)=11
0.05x=11-7.5=3.5
0.05x=3.5
x=70

so x=70;y=30

Answer 2

that solution is not correct. Is this in simplist form?