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Simplifying (2a + 30) + (a + 30) = 180 Reorder the terms: (30 + 2a) + (a + 30) = 180 Remove parenthesis around (30 + 2a) 30 + 2a + (a + 30) = 180 Reorder the terms: 30 + 2a + (30 + a) = 180 Remove parenthesis around (30 + a) 30 + 2a + 30 + a = 180 Reorder the terms: 30 + 30 + 2a + a = 180 Combine like terms: 30 + 30 = 60 60 + 2a + a = 180 Combine like terms: 2a + a = 3a 60 + 3a = 180 Solving 60 + 3a = 180 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-60' to each side of the equation. 60 + -60 + 3a = 180 + -60 Combine like terms: 60 + -60 = 0 0 + 3a = 180 + -60 3a = 180 + -60 Combine like terms: 180 + -60 = 120 3a = 120 Divide each side by '3'. a = 40 Simplifying a = 40
| 7x^2-8x-5=-6 | | a+2b+3c=45 | | 0=-x^3+11x^2+12x | | =0.25(8x-4)-2(x-4)+13(x-1) | | -5.8(2p+5)-2.4(3p-6)= | | -12/x+24/x-2=4 | | .2x+15=6x | | 7xsquared-8x-5=-6 | | 5x^3+15x^2-6x-18=0 | | 5-32-18=z-1+8z | | (5x-2y)-(x-4y)= | | (w-7)(6w^2-4w+3)= | | (X-8)(7x+4)= | | 17*-2= | | 1.4(1.5x)+1.4(-2.2y)+(-4.5)(2.0x)+(-4.5)(1.5y)= | | -7+4x=-4.6 | | -5(5x-3)=25 | | 21x-1-10x=23 | | 3y+6.8=16.2 | | 42n=-9 | | [t+3]=0 | | 8x+2=2(3x+1) | | 4x/x | | -5*(-4)-3(-2)-1=0 | | 3+7ln(x)=52 | | 3x+5x-x-2x= | | 3(4x-2)-2x= | | a+6b=18 | | [b-8]=4 | | 3/5x=51 | | 6(-2s+4)=x | | 12x+5=225 |