solve the equation 3(x-7)-x=2x-21
first, distribute3(x-7)=3x-213x-21-x=2x-213x-1x-21=2x-21add like terms2x-21=2x-21minus 2x oth sides-21=-21truewe see that the x's wil cancel therfor x=all real numbers
3(x - 7) - x = 2x - 21Distribute the the 3: 3x - 7 -x = 2x - 21Add like terms: 4x - 7 = 2x - 21Subtract 2x on both sides: 2x - 7 = -21Add -7 to both sides: 2x = -28x = -14
