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Simplifying 21 + -7a = 7 Solving 21 + -7a = 7 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + -7a = 7 + -21 Combine like terms: 21 + -21 = 0 0 + -7a = 7 + -21 -7a = 7 + -21 Combine like terms: 7 + -21 = -14 -7a = -14 Divide each side by '-7'. a = 2 Simplifying a = 2
| 14.95+0.14x=50 | | 115+.39x=50 | | 1900=0.0089t^2+1.1149t+78.4491 | | p=0.0089t^2+1.1149t+78.4491 | | 4(3m)=4x+1 | | 3m=4x+1/4 | | 75+0.10x=200+0.05x | | 9+3k-6= | | -9x-7v=3 | | 4-225x^2= | | t^2=5/6 | | 3y+5=3(2y-4) | | t^2-5t-15=0 | | t^2=32 | | 1/2t^2=16 | | 1/t=4/9+2/3 | | 8/t=5/6 | | (2x-3y+2)(-xy)= | | x^2-y^2+4x-2y-6=0 | | 5x(5)= | | 3t/10=7/4 | | (5/6)x-1/2=7 | | 4x+3y=85 | | -2(x-4)=-2x+17 | | -2x=-2x+9 | | =(x-4)2 | | =(9x+6)(9x-6) | | =(7x+1)(7x-1) | | X=14+-6x | | =(8a+5b)(8a-5b) | | =(3a+11)(3a-11) | | 6.5/3x+5 |