View Full Version : Linear Equations

djprinz

06-21-2009, 02:25 AM

Help me to do this equations, and i will be very much appreciated if u can show me the theory.... :-)

8(2 1/2x - 3/4) - 1/4(1 - x) = 1/2

10(1 - x/10) - (10 - x) - 1/100 (10 - x) = 0.05

Thx,

Stephanie

Aladdin

06-21-2009, 02:29 AM

Please show us your work, so that we know where to begin to help you

& the question is to solve ?

fasteddie65

06-21-2009, 09:30 AM

8(2 1/2x - 3/4) - 1/4(1 - x) = 1/2

First, distribute the coefficients.

20x - 6 - 1/4 + (1/4)x = 1/2

Now combine like terms.

(81/4)x - 25/4 = 1/2

Add 25/4 to both sides.

(81/4)x = 27/4

Finally, multiply both sides by 4/81.

x = 3

10(1 - x/10) - (10 - x) - 1/100 (10 - x) = 0.05

Again, distribute.

10 - x - 10 + x - 1/10 + (1/100)x = 1/20

Combine like terms.

(1/100)x - 1/10 = 1/20

Add 1/10 to each side.

(1/100)x = 3/20

Multiply each side by 100.

x = 15

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