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Simplifying 7 + -1(3.1 + -0.1y) = 3 + -0.2y 7 + (3.1 * -1 + -0.1y * -1) = 3 + -0.2y 7 + (-3.1 + 0.1y) = 3 + -0.2y Combine like terms: 7 + -3.1 = 3.9 3.9 + 0.1y = 3 + -0.2y Solving 3.9 + 0.1y = 3 + -0.2y Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.2y' to each side of the equation. 3.9 + 0.1y + 0.2y = 3 + -0.2y + 0.2y Combine like terms: 0.1y + 0.2y = 0.3y 3.9 + 0.3y = 3 + -0.2y + 0.2y Combine like terms: -0.2y + 0.2y = 0.0 3.9 + 0.3y = 3 + 0.0 3.9 + 0.3y = 3 Add '-3.9' to each side of the equation. 3.9 + -3.9 + 0.3y = 3 + -3.9 Combine like terms: 3.9 + -3.9 = 0.0 0.0 + 0.3y = 3 + -3.9 0.3y = 3 + -3.9 Combine like terms: 3 + -3.9 = -0.9 0.3y = -0.9 Divide each side by '0.3'. y = -3 Simplifying y = -3
| 3x-y-z=12 | | 8x(x^2+2x-3)= | | (3x^5)(-5x^9)(3x^3)= | | 5w-3+2(2w+7)=-5(w+1) | | 5x+4=31 | | (-1/7y^6)(3/7y^6)= | | (-5y^4)(-3y^2)= | | 9x^3*5x^6= | | 6=3/5x | | (4z-10)-(2z-8)= | | 5(2x-27)=3(7x-34) | | 5x(2x-7)+2x(8-5x)=5 | | -3(4s-4)-12=-3(9s+6)-3 | | a(x)=19(2.046) | | 6=-9/u | | 13(t-5)5t=6(3t+5)-10 | | 7x+22=3x+32 | | (-2x^2y)(-7x^3y^4)= | | 1+r=38.874 | | 9x+18=2(4x+9) | | (4x)(3x^2)(x^6)= | | 1/2x2/3/5/6 | | 2.7x-3-(x+0.6)=-0.2 | | 1+r=2.046 | | -21=g(g-10) | | 143-9x=8 | | 143-2x=8 | | (6p^6)(3p^7)= | | 5z^2+66z=z^3 | | (z+8)(z+12)=-3 | | (2+8)(z+12)=3 | | (-6b^2c^2)(4bc^7)= |