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Simplifying (7x + 2) + (2x + 7) = 90 Reorder the terms: (2 + 7x) + (2x + 7) = 90 Remove parenthesis around (2 + 7x) 2 + 7x + (2x + 7) = 90 Reorder the terms: 2 + 7x + (7 + 2x) = 90 Remove parenthesis around (7 + 2x) 2 + 7x + 7 + 2x = 90 Reorder the terms: 2 + 7 + 7x + 2x = 90 Combine like terms: 2 + 7 = 9 9 + 7x + 2x = 90 Combine like terms: 7x + 2x = 9x 9 + 9x = 90 Solving 9 + 9x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + 9x = 90 + -9 Combine like terms: 9 + -9 = 0 0 + 9x = 90 + -9 9x = 90 + -9 Combine like terms: 90 + -9 = 81 9x = 81 Divide each side by '9'. x = 9 Simplifying x = 9
| x-4*12=48x | | loga=-2.799 | | 8f-15=33 | | 15+4(m-2)=2 | | 32x=2x^3 | | -9+22=-5 | | 7p-12-11p+8p+3= | | 3[x-5]=12 | | 850000=x+((x)(0.1)(4)) | | 15+4(m-2)= | | 850000=x+((x)(01)(4)) | | a^2-30a-180= | | 1/8=4x/5 | | 6.42-10d=-2.5 | | 9n-4+n= | | -2(5x+18)=-13x | | [y-8]+6=15 | | 16-3y+4y= | | 2y/3-7=17 | | 6x+118=180 | | 850000=x((x)(4)(.1)) | | -6-9x-25x=13-3(13x+23) | | 6w+5(w-2)= | | 1.9x+3.4=18.6 | | 6+118=180 | | 7x+-9x=-32+12 | | 7(k+7)=182 | | 2m-16m=112 | | -13x-7x=10x+21 | | 4r-1=-69 | | 14x+2m=4m-16 | | 10y+2=12 |