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Simplifying (4a + 16) + -1(a + -4) = 0 Reorder the terms: (16 + 4a) + -1(a + -4) = 0 Remove parenthesis around (16 + 4a) 16 + 4a + -1(a + -4) = 0 Reorder the terms: 16 + 4a + -1(-4 + a) = 0 16 + 4a + (-4 * -1 + a * -1) = 0 16 + 4a + (4 + -1a) = 0 Reorder the terms: 16 + 4 + 4a + -1a = 0 Combine like terms: 16 + 4 = 20 20 + 4a + -1a = 0 Combine like terms: 4a + -1a = 3a 20 + 3a = 0 Solving 20 + 3a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + 3a = 0 + -20 Combine like terms: 20 + -20 = 0 0 + 3a = 0 + -20 3a = 0 + -20 Combine like terms: 0 + -20 = -20 3a = -20 Divide each side by '3'. a = -6.666666667 Simplifying a = -6.666666667
| 25/0.1=80/x | | 21x-1+20x+5=180 | | x+(3x-5)+(x+10)=180 | | x=3+(-3) | | 9x+11+10x+5=180 | | 6m-4m=m+11 | | h(7.5)=25+50(7.5) | | 4a^2-a+1=0 | | 4v^2-16+16=0 | | y-(-3)=4/5(x-2) | | 13x-5+25x-5=180 | | x=-8+17 | | 60x=80x-60 | | 21x+5=7 | | y=2(-8+y)-1 | | 9a+8-8a=4 | | -6x+x^3=0 | | 0.2(x+1)=2x+1 | | x+(20+-1y)=12 | | 20+-1y=2x-1 | | -103+6y+2=4(4y-4)-5 | | 14y=-7/3 | | (4+2)+3=9+(8xa) | | f(8)=x^2-12x+27 | | -7x+12x+42=0 | | t(x)=8 | | 9×a/6=8 | | 9c-36+3=2+c-35 | | -(-0.6666666667+0.3333333333y)+y-4=0 | | 1x+2x+30=180 | | 5(x+3)-x=2x+5 | | 2x^2+20x-4=80 |