Question

solve the simultaneous equations 7/2x+2y=5 35/2x+12y=25​

Answer 1

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Answer 2

Answer:

x=0.7   y=0

Step-by-step explanation:

2y=5-7/2x

2y=10x-7/2x

y=10x-7/4x

35/2x+12(10x-7/4x)=25

35/2x+3(10x-7)/x=25

35/25x+30x-21/x=25

35+2(30x-21)/2x=25

35+60x-42=50x

60x-50x-7=0

10x=7

x=7/10=0.7

20y=10x-7/4x=40x(7/10)-7/4(10/7)=7-7/40/7

0/40/7=0