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Simplifying 3a + 12 + (-3a) = 5a + 7 + (-3a) Reorder the terms: 12 + 3a + (-3a) = 5a + 7 + (-3a) Combine like terms: 3a + (-3a) = 0 12 + 0 = 5a + 7 + (-3a) 12 = 5a + 7 + (-3a) Reorder the terms: 12 = 7 + 5a + (-3a) Combine like terms: 5a + (-3a) = 2a 12 = 7 + 2a Solving 12 = 7 + 2a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-2a' to each side of the equation. 12 + -2a = 7 + 2a + -2a Combine like terms: 2a + -2a = 0 12 + -2a = 7 + 0 12 + -2a = 7 Add '-12' to each side of the equation. 12 + -12 + -2a = 7 + -12 Combine like terms: 12 + -12 = 0 0 + -2a = 7 + -12 -2a = 7 + -12 Combine like terms: 7 + -12 = -5 -2a = -5 Divide each side by '-2'. a = 2.5 Simplifying a = 2.5
| k+20=50 | | 10[100s]= | | X*9-3=6 | | 9(u-2)+1.50u=8.25 | | 1[100s]= | | 9(u-2)+1.50=8.25 | | 11x+9=3x+12x | | Z*7-3=7 | | (16x-5)(16x+5)=0 | | (y^2+2)-4(8+y)=15 | | 0.1x=0.311 | | (y^2+2)-4(8+y)=47 | | 4s+31=115 | | 12x+2=110 | | 73-6p=46 | | 42.02+x=42.31 | | 0.82x=0.4756 | | 46-6p=73 | | 42=3x-7 | | 15/14x10/21 | | 2/5x-4/3x | | 46+6p=73 | | T*5-8=14 | | 73+6p=46 | | 3x-y+5z=-8 | | 195+x=12x-3 | | 7+x=-129+(-3x) | | 15x-13=8x+2 | | -11z=121/5 | | 12=8x-4(3x-7) | | x+x*0.5=90 | | 524+2x=550 |