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Simplifying 2 + -4a = 20 + -10(2a + 5) Reorder the terms: 2 + -4a = 20 + -10(5 + 2a) 2 + -4a = 20 + (5 * -10 + 2a * -10) 2 + -4a = 20 + (-50 + -20a) Combine like terms: 20 + -50 = -30 2 + -4a = -30 + -20a Solving 2 + -4a = -30 + -20a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '20a' to each side of the equation. 2 + -4a + 20a = -30 + -20a + 20a Combine like terms: -4a + 20a = 16a 2 + 16a = -30 + -20a + 20a Combine like terms: -20a + 20a = 0 2 + 16a = -30 + 0 2 + 16a = -30 Add '-2' to each side of the equation. 2 + -2 + 16a = -30 + -2 Combine like terms: 2 + -2 = 0 0 + 16a = -30 + -2 16a = -30 + -2 Combine like terms: -30 + -2 = -32 16a = -32 Divide each side by '16'. a = -2 Simplifying a = -2
| 19+x/2=15 | | 9z-4=14 | | r^2+2r-4=0 | | 4=15(1/2) | | -0.4=-4.9 | | 4w-5=15 | | (2x+5)(4x+6)= | | 5(1/2)=20 | | x-456=8765 | | -6(2x+3)=18 | | 4x^2-40x+99=0 | | (3x^3-4x^2+6x)-(7x^2+4x+5)= | | x+84=-22 | | 7m+5c-10m-9c= | | 9x+8y=-73 | | -3y=5x+10 | | 76%=497.8 | | w^2-w-42=0 | | 6x+55+6x-24=115 | | 497.8=76% | | 7x^2+15x+14=0 | | 6v+14=8(v+2) | | 0.5(x+2)=.45x-6.5 | | 63x^2+7x=0 | | (3y-2)/(y+1)=4-(y+2)/(y-1) | | x+(x+2)=3.78 | | 2/3(3x-9)=8 | | 1/2/3/4/5/6/7/8/9/10=1 | | 497.8/76%= | | (3x+7)=35 | | 7h+2=(3+10) | | 7(8/9/10/11/12/13)*(8/15)=1 |