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Simplifying 21 = 7x + -5x + 3 Reorder the terms: 21 = 3 + 7x + -5x Combine like terms: 7x + -5x = 2x 21 = 3 + 2x Solving 21 = 3 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. 21 + -2x = 3 + 2x + -2x Combine like terms: 2x + -2x = 0 21 + -2x = 3 + 0 21 + -2x = 3 Add '-21' to each side of the equation. 21 + -21 + -2x = 3 + -21 Combine like terms: 21 + -21 = 0 0 + -2x = 3 + -21 -2x = 3 + -21 Combine like terms: 3 + -21 = -18 -2x = -18 Divide each side by '-2'. x = 9 Simplifying x = 9
| 21-7b=5(8b-6)+4b | | x^2+6x+15= | | 2(5)-9=y | | 2y+5x=125 | | -5(5n+7)=5 | | 5x+4+6x=10 | | 6(2x+7y)= | | 5x-4(2x-9)=21 | | 10sin(9a)+5=12 | | -3=7x+4x-3 | | x=3(7.5)-7 | | 5+x=2x+5+4x | | 3(3y-7)-5y=9 | | -7(-3-3v)=147 | | -5x+7-2x=-63 | | 8x+8x=5+8x+1+5x | | 5(3y+7)+2y=33 | | 3x^3+Ax^2+7x+-1=2 | | y=3(5)-16 | | -4x+3(3x-16)=-23 | | 3m+35=2m+45 | | 3x^3+Ax^2+7x-1=1 | | 2(-2)+9=x | | -8x-x=-18 | | -19.8g=17.4-18.3g | | 4(2y+9)+3y=14 | | 4.7y-3.2=2.3y+4.1 | | 65=5x-25 | | 6(3c-5d+6)= | | (x)10+5=x | | X+5-2x=-7 | | -17.11+6.5q=17.4q+19.95 |