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Simplifying (7a + -15) + (9a + 25) = 90 Reorder the terms: (-15 + 7a) + (9a + 25) = 90 Remove parenthesis around (-15 + 7a) -15 + 7a + (9a + 25) = 90 Reorder the terms: -15 + 7a + (25 + 9a) = 90 Remove parenthesis around (25 + 9a) -15 + 7a + 25 + 9a = 90 Reorder the terms: -15 + 25 + 7a + 9a = 90 Combine like terms: -15 + 25 = 10 10 + 7a + 9a = 90 Combine like terms: 7a + 9a = 16a 10 + 16a = 90 Solving 10 + 16a = 90 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + 16a = 90 + -10 Combine like terms: 10 + -10 = 0 0 + 16a = 90 + -10 16a = 90 + -10 Combine like terms: 90 + -10 = 80 16a = 80 Divide each side by '16'. a = 5 Simplifying a = 5
| 1.5(r+2)=-1.5(r+10) | | x+18+3x=-23-3x-29 | | 1.5(r+2)=1.5(r+10) | | -1(8x-6y-7)= | | 42.80=9g+3.65 | | 21+0.35x=20.05 | | -5(-2x)= | | 3-8x/3-7-x/2=x/3 | | 2/3*3.14*3.8*3.8*3.8 | | 32x1/6 | | w+4.14=6.91 | | 5(5y-9)-(8y+8)= | | 32*1/6 | | u+4.11=8.89 | | 64y=9(7y+27) | | -5(5/2) | | (x^2)/(.211-x)=1.8 | | 10x^3-25x^2y^2+10xy^3=0 | | 12n^2+28n+20=4 | | 2ln(2x+8)=14 | | 7-3f=2-5f | | 3a(a-5)= | | (x^(3)*x^(4))^2a/(x^5)^3=x^13 | | 1/4x=1.2 | | 7x=800 | | 3x+5y=85 | | 4q+5=q-7 | | 10x-3x=77 | | x=-3(10)+35 | | (x-4)/4/-.33 | | 4+11-2a=a | | 5-2(8-4m)-3m= |