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Simplifying 3(2r + 7) + -4(r + 9) = 0 Reorder the terms: 3(7 + 2r) + -4(r + 9) = 0 (7 * 3 + 2r * 3) + -4(r + 9) = 0 (21 + 6r) + -4(r + 9) = 0 Reorder the terms: 21 + 6r + -4(9 + r) = 0 21 + 6r + (9 * -4 + r * -4) = 0 21 + 6r + (-36 + -4r) = 0 Reorder the terms: 21 + -36 + 6r + -4r = 0 Combine like terms: 21 + -36 = -15 -15 + 6r + -4r = 0 Combine like terms: 6r + -4r = 2r -15 + 2r = 0 Solving -15 + 2r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + 2r = 0 + 15 Combine like terms: -15 + 15 = 0 0 + 2r = 0 + 15 2r = 0 + 15 Combine like terms: 0 + 15 = 15 2r = 15 Divide each side by '2'. r = 7.5 Simplifying r = 7.5
| 4x-225=2025 | | (y+5)(y+5)=2y^2+3y+37 | | (3*sin(1.23))/(cos^2(1.23) | | 3(y^2+10y+3)= | | 3x-3(-4-2x)=12+9x | | y=1/4x/ | | (8x^3+6x-3)+(-2x+6)= | | (16+x)*(12+x)=396 | | X+7.1=10.4 | | 3(x+7)=7+3x | | 1.95p+15(1.55)=1.75(p+15) | | 3(3x+3)+1=6x+1 | | 3a+7b-5(9a-9b)= | | 8x+6-9x-3=4x-5x+0 | | 3(a+2b)= | | 9=3(x-2)-(x-5) | | -15/16+1/2= | | y/7-7-5/2 | | 2ab(a-3)-c= | | (Sin(x-1))(sin(x+5))=0 | | 3/4(12x-8)-214 | | 10x+6=x+6 | | 4.9t^2+11t=76 | | -17/9*3/16= | | f(0)=3x^2+6x+3070 | | 3x=x+(4x-12) | | 5=x(2x+3) | | 10x-(9x-4)=13 | | 3(f+3)=7+3f+6-f | | 4w^2=-12w | | 2(y+8)2+10=0 | | =3y^2+10y+3 |