First you should add +6 on both sides of the equation and then add -x so you will have: 2x - x = 4 +6 so x = 10 :))) i hope this is helpful have a nice day
The frame will have the same thickness on both sides of the mirror. Therefore we add 5+x+x to get the total length, and we have 4+x+x to get the total width.
The area is found by multiplying the total width and total length:
A=(5+x+x)(4+x+x) A=(5+2x)(4+2x)
Multiplying the binomials, we have: A=5*4+5*2x+2x*4+2x*2x A=20+10x+8x+4x² A=20+18x+4x²
We know that the area is 19.75: 19.75=20+18x+4x²
We need quadratics set equal to 0, so subtract 19.75 from each side: 19.75-19.75 = 20+18x+4x²-19.75 0=0.25+18x+4x²
