Упростите: а) 5a+4a б) 2x+3x+10 в) 1.5a+a+2.5a г) 6y+8+6y д) 7m+m

Упростим.

a) 5 * a + 4 * a = a * (5 + 4) = a * 9  = 9 * a; 

б) 2 * x + 3 * x + 10 = x * (2 + 3) + 10 = x * 5 + 10 = 5 * x + 10; 

в) 1.5 * a + a + 2.5 * a = a * (1.5 + 1 + 2.5) = a * (4 + 1) = a * 5 = 5 * a; 

г) 6 * y  + 8 + 6 * y = y * (6 + 6) + 8 = 12 * y + 8; 

д) 7 * m + m = m * (7 + 1) = m * 8 = 8 * m; 

е) 3/8 * n + 5/8 * n + 1/3 * n = n * (3/8 + 5/8 + 1/3) = n * (8/8 + 1/3) = n * (1 + 1/3) = 1 1/3 * a.