Question 986004
3. Multiply everything by 10
7x-5x^2-8=-60
-5x^2+7x+52=0
5x^2-7x-52=0
(5x+13)(x-4)=0
x=-13/5
x=4
;
check 
2.8-8-0.8=-6
-1.82+3.38-0.8=-6
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4. -8<2x-3<13
add 3 to everything
-5<2x<16
-2.5 less than x less than 8