(1) 5.7(2x-6)=8 (2) 6.3(6x-7)=15x=12

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(1) 5.7(2x-6)=8 (2) 6.3(6x-7)=15x=12
(1) 5.7(2x-6)=8 (2) 6.3(6x-7)=15x=12

(1) 5.7(2x-6)=8 (2) 6.3(6x-7)=15x=12
1)5.7*2x-5.7*6=8
11,4x=34.2+8
11.4x=42.2
x=3.7
2)6.3*6x-6.3*7=12
37.8x=44.1+12
37.8x=56.1
x=1.48
x=1.5

(1) 5.7*(2x-6)=8
解得 x=211/57
(2) 6.3(6x-7)=15x+12
解得 x=187/76

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