[" Solve the equefion: "],[qquad 1+4+7+10+cdots+x=287]

Solve the equation (x+1) + (x+4)+ (x+7) + cdots + (x+28) = 155.

Solve the equation : cos^(7)x+sin^(4)x=1

Solve the equation: |[15-x, 1, 10],[11-3x, 1, 16],[7-x, 1, 13]|=0

Solve the equation: |[15-x, 1, 10],[11-3x, 1, 16],[7-x, 1, 13]|=0

Solve : 1-4/7=

Solve the equation |x-1|+|7-x|+2|x-2|=4

Solve the following inequations : |x+1/4| > 7/4 .

Solve the following equations for x and y log_10xx+1/2log_10xx+1/4log_10xx+....=y and (1+3+5+...+(2y-1))/(4+7+10+....+(3y+1))=20/(7log_10x)

Solve the inequality ((x-1)(x+7))/(x+4)gt0