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Simplifying 7 + -1a + 2 = 15 Reorder the terms: 7 + 2 + -1a = 15 Combine like terms: 7 + 2 = 9 9 + -1a = 15 Solving 9 + -1a = 15 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1a = 15 + -9 Combine like terms: 9 + -9 = 0 0 + -1a = 15 + -9 -1a = 15 + -9 Combine like terms: 15 + -9 = 6 -1a = 6 Divide each side by '-1'. a = -6 Simplifying a = -6
| 0.6+y=0.7 | | 0.5=y+0.4 | | 6x+18-3x+8=-3x-4x+16 | | 30(15.60)=23N+8 | | 1.4=y+0.9 | | 4e-2=30.8 | | Y+0.6=1.4 | | 0.9=0.5+y | | 7x-34=90 | | 6x-21-15x-5+4x=8-10x+6 | | 0.3=y+0.1 | | Y+0.5=0.8 | | A^2-20a+84=0 | | 3(6a+5)+30= | | Y+0.1=0.5 | | 11-2+8x+5=32 | | 1^x=5/12 | | n-27=135 | | x^(5/2)=3 | | 1.1=0.5+y | | (4n-8)(4n+8)= | | 0.6+y=1.2 | | 6x+2-25=4x-11 | | 16j=320 | | (3x+7)+(x+8)+(5x-9)+(8x)= | | 5y^2-17y=12 | | y=a(x+2)(x+1)(x-1) | | y=a(x+2) | | 2x=20000 | | 0=5+3(3-4x) | | 6x+4x-32=9x+21 | | 2(4x+9)=10x+8-2x+10 |