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Simplifying (2a + -9) + -1(a + 9) = 0 Reorder the terms: (-9 + 2a) + -1(a + 9) = 0 Remove parenthesis around (-9 + 2a) -9 + 2a + -1(a + 9) = 0 Reorder the terms: -9 + 2a + -1(9 + a) = 0 -9 + 2a + (9 * -1 + a * -1) = 0 -9 + 2a + (-9 + -1a) = 0 Reorder the terms: -9 + -9 + 2a + -1a = 0 Combine like terms: -9 + -9 = -18 -18 + 2a + -1a = 0 Combine like terms: 2a + -1a = 1a -18 + 1a = 0 Solving -18 + 1a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + 1a = 0 + 18 Combine like terms: -18 + 18 = 0 0 + 1a = 0 + 18 1a = 0 + 18 Combine like terms: 0 + 18 = 18 1a = 18 Divide each side by '1'. a = 18 Simplifying a = 18
| (5x+3)+12=5 | | 17x+7=-10 | | 2x+6=x+4 | | 5x-y=11 | | x-.4x=9.6 | | 40m^2q+mq-6q= | | 24x^2-42x+9= | | 20x^2+22x+6= | | 3m+8=32 | | 2(x+3)+5=5X-4 | | 3x^2-15x+16= | | 20y^2-39y-11= | | 1/19= | | 19/1= | | 8w^2-14w+3= | | 10m^2-23m+12= | | x^3-x(y^2)+(x^2)y-y^3=0 | | 12s^2+11s-5= | | (1+3m-4m^3)=0 | | 2x-3=15-6 | | 1+3m+4m^2=0 | | 1+3m+4m^3=0 | | 15m^2+m-2= | | 2y^2+7y+6= | | 3a^2+10a+7= | | 6x+(3x-5x^2)= | | 75h^4+60h^3+12h^2= | | 80+(146-46*3)=x | | 80+(146-46*3)=380 | | 98h^5-2h= | | log(6x-1)+log(x+5)=1 | | 80+(146-46*3)= |