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Simplifying (7 + -4i) + (-2 + 5i) = 9 Remove parenthesis around (7 + -4i) 7 + -4i + (-2 + 5i) = 9 Remove parenthesis around (-2 + 5i) 7 + -4i + -2 + 5i = 9 Reorder the terms: 7 + -2 + -4i + 5i = 9 Combine like terms: 7 + -2 = 5 5 + -4i + 5i = 9 Combine like terms: -4i + 5i = 1i 5 + 1i = 9 Solving 5 + 1i = 9 Solving for variable 'i'. Move all terms containing i to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 1i = 9 + -5 Combine like terms: 5 + -5 = 0 0 + 1i = 9 + -5 1i = 9 + -5 Combine like terms: 9 + -5 = 4 1i = 4 Divide each side by '1'. i = 4 Simplifying i = 4
| 18x-20x-3=5 | | 6w-14w=72 | | 20(20-x)=300 | | 8x+7=x+63 | | 3x+2=60 | | 9.81+0.611= | | 180+180=x | | 9(x-6)=-35 | | 5x-15x-11=33 | | 8h=-3 | | 2=-2x-5x-5 | | 6c-15=5c | | 7(200)+12x=1756 | | (x+0.5)(x+4.8)=0 | | 7x+7=x+37 | | 11x-5-6x=40 | | 2(x-6)=-35 | | 3852.54=260.90+(x+(x*0.0725)) | | 8+2(g-2)=10 | | 6x-20=300 | | 8(x-7)=35 | | 3x^2-8x=5 | | n=-11+31 | | 3x^2-8x=5 | | -7d-4d+3d=40 | | y=3x-5ax | | 5x+12+6x-10=180 | | 9x^2+30x-55=0 | | 3x^2-12-12= | | x-6=60 | | 4(x-5)=35 | | 36m+96=7850 |