1) (x + 36.1) * 5.1 = 245.82
x + 36.1 = 245.82 : 5.1
x + 36.1 = 48.2
x = 48.2 - 36.1
x = 12.1
2) (m - 0.67) * 0.02 = 0.0152
m - 0.67 = 0.0152 : 0.02
m - 0.67 = 0.76
m = 0.76 + 0.67
m = 1.43
3) (x + 24.3) : 18.3 = 3.1
x + 24.3 = 3.1 * 18.3
x + 24.3 = 56.73
x = 56.73 - 24.3
x = 32.43
4) (y - 15.7) : 19.2 = 407
y - 15.7 = 407 * 19.2
y - 15.7 = 7814.4
y = 7814.4 + 15.7
y = 7830.1