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Simplifying 8r + 9 + 7r + 6 = 90 Reorder the terms: 9 + 6 + 8r + 7r = 90 Combine like terms: 9 + 6 = 15 15 + 8r + 7r = 90 Combine like terms: 8r + 7r = 15r 15 + 15r = 90 Solving 15 + 15r = 90 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + 15r = 90 + -15 Combine like terms: 15 + -15 = 0 0 + 15r = 90 + -15 15r = 90 + -15 Combine like terms: 90 + -15 = 75 15r = 75 Divide each side by '15'. r = 5 Simplifying r = 5
| .5n+14=46 | | 27.14=-4.6 | | 7+a=15 | | -4a+2+5a=15-26 | | 8x^2-x-9=0 | | -4.6=27.14 | | -3(x-1)+4=-14 | | -3(4n+1)=23 | | 3(5x+2)+5=13x+3 | | 5v+17=2v-25 | | 4n^2-19n+21=0 | | k+5/10=k-12/9 | | 2w-45=-5(w+2) | | 2.4w=16.8 | | 14.2t-25.7=3.8t+30.46 | | 4g+15=6g-45 | | 9ab^2-3abc= | | 5x=-26 | | 9x-12x=31-19 | | -6+5x-8x=9 | | 15v=255 | | 121+144+x=360 | | h-28=19 | | 6(b-5)=2(10+3b) | | 0.5x-2.3=14.75 | | 121+144+x=160 | | -15=6x+3 | | 6=-0.8n | | 2p-9=7*(2p-3) | | 2x-7x+8=9x | | 131+160+x=360 | | 7a^2-19a+10=0 |