1) x/7 + 1 = 2x/7 = 1x = 7
2) a + 5b/15 + 2a + 4b/15 = (a + 2a)/15 + (5b + 4b)/15= 3a/15 + 9b/15= (3a + 9b)/15
3) x/3 + x - 2/5 = (5x + 3(x - 2))/ 15= (5x + 3x - 6)/ 15= (8x - 6)/15
4) a/6 + b/6 = (a + b)/6
5) x + 4y/12 + 2x + 5y/12 = (3x + 4y + 2x + 5y)/12= (5x + 9y)/12
1) x/7 + 1 = 2
x/7 = 1
x = 7
2) a + 5b/15 + 2a + 4b/15 = (a + 2a)/15 + (5b + 4b)/15
= 3a/15 + 9b/15
= (3a + 9b)/15
3) x/3 + x - 2/5 = (5x + 3(x - 2))/ 15
= (5x + 3x - 6)/ 15
= (8x - 6)/15
4) a/6 + b/6 = (a + b)/6
5) x + 4y/12 + 2x + 5y/12 = (3x + 4y + 2x + 5y)/12
= (5x + 9y)/12