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EXERCISE 2.6Solve the following equations.12=22.=153. z+1593y +4-274+4_-4.2-65 |
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Answer» 8x-3/3x =2; 8x-3=6x; 8x-6x-3=2x-3; 2) 9x/7-6x=15; 9x=15(7-6x); 9x=105-90x; 9x+90x=105; 99x=105; 8x-3/3x=2,; 8x-3=6x; 8x-6x-3; 2x=3; ; 2) 9x/7-6x=15; 9x=15(7-6x); 9x=105-90x; 99x=105; x=105/99=35/33; 3)z/z+15=4/9; 9z=z+15(4); 9z-z=60; 8z=60; z=60/8=30/4=15/2;; 3y+4/2-6y=-2/5; (3y+4)(5)=(-2)(2-6y); 15y+20=-4+12y; 15y-12y=-4-20; 3y=-24; y=24/3=-8; 5) 7y+4/y+2=-4/3; 7y+4(3)=y+2(-4); 21y+12=-4y-8; 21y-4y=-8-12; 17y=-20; ; y=20/17 8x-3=6x or 8x-6x=3 or 2x=3 or x=3/2 the answer of this is8x-3____ 3x 1. 8x - 3/ 3x = 2 8x × 3x = 2 + 3 24x = 5 x = 24/5 x = 4.9 2. 9x / 7 - 6x = 15 9x × 6x = 15 -7 54x = 8 x = 54 / 8 x = 6.75 3. z / z + 15 = 4/9 z^2 = 4/9 - 15 z^2 = 4/9 - 135/9 z^2 = -131/9 z = -131/49/z z = -131/49 4. 3y+4 / 2-6y = -2/5 3y×6y / -4+2 = -2/5 18y / -2 = -2/5 18y = -2/5 ×-2 18y = 4/5 y = 4/5/18 y = 4/5×18 y = 72/5 y = 14.4 |
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