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Simplifying (21b + -8) + -5(4b + 4) = -7 Reorder the terms: (-8 + 21b) + -5(4b + 4) = -7 Remove parenthesis around (-8 + 21b) -8 + 21b + -5(4b + 4) = -7 Reorder the terms: -8 + 21b + -5(4 + 4b) = -7 -8 + 21b + (4 * -5 + 4b * -5) = -7 -8 + 21b + (-20 + -20b) = -7 Reorder the terms: -8 + -20 + 21b + -20b = -7 Combine like terms: -8 + -20 = -28 -28 + 21b + -20b = -7 Combine like terms: 21b + -20b = 1b -28 + 1b = -7 Solving -28 + 1b = -7 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '28' to each side of the equation. -28 + 28 + 1b = -7 + 28 Combine like terms: -28 + 28 = 0 0 + 1b = -7 + 28 1b = -7 + 28 Combine like terms: -7 + 28 = 21 1b = 21 Divide each side by '1'. b = 21 Simplifying b = 21
| 4a+b=1 | | x^2+5x+14=10 | | 5ln(x-1)=9 | | 9xsquared-16=0 | | 4x-2=5x-4 | | y=(x+5i)(x-5i)(x-1) | | (5x-3)x(5x+3)=0 | | 3(x-5)=5x | | y=(x+5i)(x-5i) | | x^2-x-2=-3x+1 | | 4k-3(8k-6)=-2 | | 3a+2-5a=7+4n | | 3x+11=2(x+11) | | 0.07x=1720 | | 15n+15+3= | | h(t)=-16t^2+800(t) | | 4x^2=17X+5 | | x^2+10x+27=6 | | x*0.07=1720 | | 3*11-40+2*11=15 | | 11n+15-n+5n+3= | | (28b-4)-9(3b+3)=-7 | | 3(4x-2y)=42 | | 4(7K+7)-3=-5-2 | | -10=0v | | 4x-7-x=-3-2x | | 4x+129=9x+229 | | -3N-6+2N=-7+4N | | -2a-a=21 | | 7-(3-m)=2m | | 2(6X-4)=9 | | 12=9y+11(-3y-7) |